Obesity

Recently, the glucagonlike peptide 1 (GLP-1) receptor agonist semaglutide has changed the obesity treatment landscape. This and other similar medications approaching the market are in high demand because of their ease of use, effectiveness, and lack of interactions with other medications.

Semaglutide is a weekly subcutaneous injection approved by the U.S. Food and Drug Administration for weight loss in conjunction with lifestyle change. It elicits an average weight loss of 15%-18% from baseline in adults with overweight or obesity (body mass index ≥ 27 with at least one obesity-related comorbidity or BMI ≥ 30) in a period of 52-68 weeks (Wilding et al; Rubino et al). Liraglutide is a daily GLP-1 agonist, which is FDA approved for treatment of overweight, with an average weight loss of 8% from treatment start.

Though GLP-1 agonists are very effective for weight loss, questions about side effects have arisen. And now, there are also concerns surrounding GLP-1 agonist–induced rapid weight loss and its resulting impact on muscle mass.

Current modalities of weight loss don’t specifically target fat mass (FM), so it is expected that, to a degree, fat-free mass (FFM), including muscle mass, will also be lost along with fat mass.

Loss of muscle mass is associated with an increased risk for lower bone density, fatigue, injuries, and decreased strength. In addition, sarcopenic obesity, a combination of high body fat percentage and low skeletal muscle mass, is concerning in patients older than 65 years and/or postmenopausal patients. Because GLP-1 agonists cause more rapid and sustainable weight loss, compared with intensive behavioral lifestyle therapy, there has been more media attention recently about possible muscle mass loss with GLP-1–agonist use.

However, proper well-rounded approaches to obesity treatment can mitigate the issue of muscle mass loss even when rapid weight loss occurs. When weight loss is achieved with very-low-calorie dietary changes alone (without exercise), it is also associated with significant reductions in lean muscle mass; however, incorporating exercise, preferably resistance training, can mitigate the muscle mass loss. The muscle-preserving effect of exercise is especially prominent in older populations where it is needed most and should be incorporated (Armanento-Villareal et al.; Winter et al.; Batsis and Zagaria; Mason et al.).

Furthermore, studies in rat models demonstrate liraglutide induces myogenesis in myoblasts and protects against muscular atrophy. In human studies, GLP-1 infusion was associated with an improved skeletal and cardiac muscle microvasculature, suggesting that GLP-1 agonists may have some positive effects on the muscle. A 2020 systematic review examined the effect of gradual vs. rapid weight loss and demonstrated no significant difference in muscle loss between the rapid weight-loss group and gradual weight-loss group. Even after gastric bypass surgery, most of the muscle mass loss occurred during the first year, when weight loss is happening. However, after the first year, skeletal muscle was maintained even without introducing additional dietary or exercise interventions.

Age, although a consideration, should not be a discriminating factor against treating obesity. Sarcopenic obesity is a serious risk especially in patients aged 65 years or older, but GLP-1–agonist therapy can be beneficial to prevent muscle atrophy and increase blood flow to skeletal and cardiac muscle. In addition, patients must be encouraged to maintain an appropriate dietary and exercise regimen to treat their obesity. Management of obesity is complex and multifaceted, and patients should understand their responsibility to follow clinician recommendations during this journey to decrease the associated side effects.

Overall, with any level of weight loss achieved with current strategies, a certain amount of muscle mass loss is expected. All efforts to actively preserve muscle mass can prevent too much muscle loss.

Therefore, providers prescribing medications like GLP-1 agonists to treat obesity must also counsel patients about incorporating aerobic exercise and resistance training as part of the treatment plan as well as ensuring they eat a high-protein diet. Generally, resistance training is preferred over aerobic exercise for muscle mass preservation and increased strength, but studies also demonstrate benefit with aerobic exercise.

In the first few visits of initiating obesity treatment, patients should be encouraged to start to incorporate light physical activity as tolerable while starting to make dietary changes to include at least 0.8g/kg/day of protein (Fappi et al.). These initial visits are also an important opportunity for clinicians to ingrain the importance of exercise as part of healthy weight loss. At every visit, physical activity level should be assessed.

Dr. Ahn is a clinical fellow in obesity medicine, Weight Management Center, at Massachusetts General Hospital, Boston. Dr. Singhal is an assistant professor of pediatrics, Harvard Medical School, Boston, and director, Pediatric Program, MGH Weight Center, Massachusetts General Hospital. Dr. Singhal reported that his spouse consults with AstraZeneca, Dilachi Pharma, Eli Lilly, Genetech, Immunomedics, Pfizer, Sanofi, and Novartis.

A version of this article first appeared on Medscape.com.

Recently, the glucagonlike peptide 1 (GLP-1) receptor agonist semaglutide has changed the obesity treatment landscape. This and other similar medications approaching the market are in high demand because of their ease of use, effectiveness, and lack of interactions with other medications.

Semaglutide is a weekly subcutaneous injection approved by the U.S. Food and Drug Administration for weight loss in conjunction with lifestyle change. It elicits an average weight loss of 15%-18% from baseline in adults with overweight or obesity (body mass index ≥ 27 with at least one obesity-related comorbidity or BMI ≥ 30) in a period of 52-68 weeks (Wilding et al; Rubino et al). Liraglutide is a daily GLP-1 agonist, which is FDA approved for treatment of overweight, with an average weight loss of 8% from treatment start.

Though GLP-1 agonists are very effective for weight loss, questions about side effects have arisen. And now, there are also concerns surrounding GLP-1 agonist–induced rapid weight loss and its resulting impact on muscle mass.

Current modalities of weight loss don’t specifically target fat mass (FM), so it is expected that, to a degree, fat-free mass (FFM), including muscle mass, will also be lost along with fat mass.

Loss of muscle mass is associated with an increased risk for lower bone density, fatigue, injuries, and decreased strength. In addition, sarcopenic obesity, a combination of high body fat percentage and low skeletal muscle mass, is concerning in patients older than 65 years and/or postmenopausal patients. Because GLP-1 agonists cause more rapid and sustainable weight loss, compared with intensive behavioral lifestyle therapy, there has been more media attention recently about possible muscle mass loss with GLP-1–agonist use.

However, proper well-rounded approaches to obesity treatment can mitigate the issue of muscle mass loss even when rapid weight loss occurs. When weight loss is achieved with very-low-calorie dietary changes alone (without exercise), it is also associated with significant reductions in lean muscle mass; however, incorporating exercise, preferably resistance training, can mitigate the muscle mass loss. The muscle-preserving effect of exercise is especially prominent in older populations where it is needed most and should be incorporated (Armanento-Villareal et al.; Winter et al.; Batsis and Zagaria; Mason et al.).

Furthermore, studies in rat models demonstrate liraglutide induces myogenesis in myoblasts and protects against muscular atrophy. In human studies, GLP-1 infusion was associated with an improved skeletal and cardiac muscle microvasculature, suggesting that GLP-1 agonists may have some positive effects on the muscle. A 2020 systematic review examined the effect of gradual vs. rapid weight loss and demonstrated no significant difference in muscle loss between the rapid weight-loss group and gradual weight-loss group. Even after gastric bypass surgery, most of the muscle mass loss occurred during the first year, when weight loss is happening. However, after the first year, skeletal muscle was maintained even without introducing additional dietary or exercise interventions.

Age, although a consideration, should not be a discriminating factor against treating obesity. Sarcopenic obesity is a serious risk especially in patients aged 65 years or older, but GLP-1–agonist therapy can be beneficial to prevent muscle atrophy and increase blood flow to skeletal and cardiac muscle. In addition, patients must be encouraged to maintain an appropriate dietary and exercise regimen to treat their obesity. Management of obesity is complex and multifaceted, and patients should understand their responsibility to follow clinician recommendations during this journey to decrease the associated side effects.

Overall, with any level of weight loss achieved with current strategies, a certain amount of muscle mass loss is expected. All efforts to actively preserve muscle mass can prevent too much muscle loss.

Therefore, providers prescribing medications like GLP-1 agonists to treat obesity must also counsel patients about incorporating aerobic exercise and resistance training as part of the treatment plan as well as ensuring they eat a high-protein diet. Generally, resistance training is preferred over aerobic exercise for muscle mass preservation and increased strength, but studies also demonstrate benefit with aerobic exercise.

In the first few visits of initiating obesity treatment, patients should be encouraged to start to incorporate light physical activity as tolerable while starting to make dietary changes to include at least 0.8g/kg/day of protein (Fappi et al.). These initial visits are also an important opportunity for clinicians to ingrain the importance of exercise as part of healthy weight loss. At every visit, physical activity level should be assessed.

Dr. Ahn is a clinical fellow in obesity medicine, Weight Management Center, at Massachusetts General Hospital, Boston. Dr. Singhal is an assistant professor of pediatrics, Harvard Medical School, Boston, and director, Pediatric Program, MGH Weight Center, Massachusetts General Hospital. Dr. Singhal reported that his spouse consults with AstraZeneca, Dilachi Pharma, Eli Lilly, Genetech, Immunomedics, Pfizer, Sanofi, and Novartis.

A version of this article first appeared on Medscape.com.

Recently, the glucagonlike peptide 1 (GLP-1) receptor agonist semaglutide has changed the obesity treatment landscape. This and other similar medications approaching the market are in high demand because of their ease of use, effectiveness, and lack of interactions with other medications.

Semaglutide is a weekly subcutaneous injection approved by the U.S. Food and Drug Administration for weight loss in conjunction with lifestyle change. It elicits an average weight loss of 15%-18% from baseline in adults with overweight or obesity (body mass index ≥ 27 with at least one obesity-related comorbidity or BMI ≥ 30) in a period of 52-68 weeks (Wilding et al; Rubino et al). Liraglutide is a daily GLP-1 agonist, which is FDA approved for treatment of overweight, with an average weight loss of 8% from treatment start.

Though GLP-1 agonists are very effective for weight loss, questions about side effects have arisen. And now, there are also concerns surrounding GLP-1 agonist–induced rapid weight loss and its resulting impact on muscle mass.

Current modalities of weight loss don’t specifically target fat mass (FM), so it is expected that, to a degree, fat-free mass (FFM), including muscle mass, will also be lost along with fat mass.

Loss of muscle mass is associated with an increased risk for lower bone density, fatigue, injuries, and decreased strength. In addition, sarcopenic obesity, a combination of high body fat percentage and low skeletal muscle mass, is concerning in patients older than 65 years and/or postmenopausal patients. Because GLP-1 agonists cause more rapid and sustainable weight loss, compared with intensive behavioral lifestyle therapy, there has been more media attention recently about possible muscle mass loss with GLP-1–agonist use.

However, proper well-rounded approaches to obesity treatment can mitigate the issue of muscle mass loss even when rapid weight loss occurs. When weight loss is achieved with very-low-calorie dietary changes alone (without exercise), it is also associated with significant reductions in lean muscle mass; however, incorporating exercise, preferably resistance training, can mitigate the muscle mass loss. The muscle-preserving effect of exercise is especially prominent in older populations where it is needed most and should be incorporated (Armanento-Villareal et al.; Winter et al.; Batsis and Zagaria; Mason et al.).

Furthermore, studies in rat models demonstrate liraglutide induces myogenesis in myoblasts and protects against muscular atrophy. In human studies, GLP-1 infusion was associated with an improved skeletal and cardiac muscle microvasculature, suggesting that GLP-1 agonists may have some positive effects on the muscle. A 2020 systematic review examined the effect of gradual vs. rapid weight loss and demonstrated no significant difference in muscle loss between the rapid weight-loss group and gradual weight-loss group. Even after gastric bypass surgery, most of the muscle mass loss occurred during the first year, when weight loss is happening. However, after the first year, skeletal muscle was maintained even without introducing additional dietary or exercise interventions.

Age, although a consideration, should not be a discriminating factor against treating obesity. Sarcopenic obesity is a serious risk especially in patients aged 65 years or older, but GLP-1–agonist therapy can be beneficial to prevent muscle atrophy and increase blood flow to skeletal and cardiac muscle. In addition, patients must be encouraged to maintain an appropriate dietary and exercise regimen to treat their obesity. Management of obesity is complex and multifaceted, and patients should understand their responsibility to follow clinician recommendations during this journey to decrease the associated side effects.

Overall, with any level of weight loss achieved with current strategies, a certain amount of muscle mass loss is expected. All efforts to actively preserve muscle mass can prevent too much muscle loss.

Therefore, providers prescribing medications like GLP-1 agonists to treat obesity must also counsel patients about incorporating aerobic exercise and resistance training as part of the treatment plan as well as ensuring they eat a high-protein diet. Generally, resistance training is preferred over aerobic exercise for muscle mass preservation and increased strength, but studies also demonstrate benefit with aerobic exercise.

In the first few visits of initiating obesity treatment, patients should be encouraged to start to incorporate light physical activity as tolerable while starting to make dietary changes to include at least 0.8g/kg/day of protein (Fappi et al.). These initial visits are also an important opportunity for clinicians to ingrain the importance of exercise as part of healthy weight loss. At every visit, physical activity level should be assessed.

Dr. Ahn is a clinical fellow in obesity medicine, Weight Management Center, at Massachusetts General Hospital, Boston. Dr. Singhal is an assistant professor of pediatrics, Harvard Medical School, Boston, and director, Pediatric Program, MGH Weight Center, Massachusetts General Hospital. Dr. Singhal reported that his spouse consults with AstraZeneca, Dilachi Pharma, Eli Lilly, Genetech, Immunomedics, Pfizer, Sanofi, and Novartis.

A version of this article first appeared on Medscape.com.

MARSEILLE, FRANCE – Setmelanotide can lead to significant weight loss that lasts for at least 3 years, according to results presented at the latest French Pediatric Society conference. The treatment is effective for adults and children alike.

Setmelanotide is the culmination of two decades of research involving the identification of genes involved in early-onset obesity and the characterization of the melanocortin 4 receptor. It became available via early access in 2021.

Currently limited to use in treating obesity linked to a biallelic POMC/PCSK1 or LEPR deficiency, setmelanotide is being tested with respect to other mutations responsible for severe obesity, raising hopes that it will soon be indicated for use in a larger number of patients.

Fewer than 1% of patients who suffer from severe obesity have monogenic forms of obesity. In recent years, the hope for a targeted treatment for patients with these monogenic forms has become a reality.

Although only a small number of patients currently meet the criteria for setmelanotide treatment (namely, those with obesity linked to a biallelic POMC/PCSK1 enzyme or LEPR deficiency and patients with Bardet-Biedl syndrome), there is a real hope that patients with other forms of severe obesity will be able to benefit from this product, including those with heterozygous (not just homozygous) monoallelic variants, who account for more than 10% of patients with severe early-onset obesity.
 

Restoring satiety signaling

“Setmelanotide is a melanocortin 4 receptor agonist,” said Béatrice Dubern, MD, PhD, pediatrician at Trousseau Hospital, Paris, and member of the French medical research institute (INSERM)/Sorbonne University team on nutrition and obesity. “Its mode of action rests on activation of the leptin-melanocortin signaling pathway in the hypothalamus, which regulates hunger, satiety, energy expenditure, and, therefore, body weight. Rare genetic variants in the leptin-melanocortin pathway are associated with polyphagia and severe early-onset obesity. It is believed that more than 60 genes involved in this leptin-melanocortin pathway are currently associated with obesity.”

In July 2021, the European Medicines Agency approved setmelanotide for daily use via subcutaneous administration.
 

Weight loss maintained

In phase 3 studies, setmelanotide (melanocortin 4 receptor agonist) demonstrated its effectiveness in reducing weight and hunger for patients with obesity caused by a POMC/PCSK1 or LEPR deficiency.

Twenty-four patients aged 6 years and older showed a significant response to setmelanotide after 1 year of treatment and were included in the extension study. “Significant response” was defined as a reduction in body weight greater than or equal to 10% after 52 weeks for patients aged 18 years and older or a reduction in body mass index (BMI) z-score greater than or equal to 0.3 after 52 weeks for patients younger than 18 years.

Among all patients, the mean variation (standard deviation) in BMI was −24.8% (8.2%, n = 24), −21% (13%, n = 23), and −24% (17.9%, n = 15) at 12, 24, and 36 months, respectively.

For patients aged greater than or equal to 18 years (n = 11), the mean variation (standard deviation) in weight was −25.1% (7.7%, n = 11), −22.9% (12.5%, n = 11), and −24.4% (13.2%, n = 8) at 12, 24, and 36 months, respectively.

For children and adolescents (patients aged < 18 years, n = 13), the mean reduction (standard deviation) in BMI z-score was −1.31 ([0.66], n = 13), −1.10 ([0.79], n = 11), and −1.01 (1.22], n = 4) at 12, 24, and 36 months, respectively.

For patients younger than 18 years, the mean variation in BMI z-score was −1.01 SD after three years on setmelanotide (standard deviation, 1.22 [n = 4]). The mean BMI z-score was +2.42 SD (standard deviation, 1.22 [n = 4]) after 3 years of treatment with setmelanotide.

In sum, the patients who achieved a reduction in body weight of at least 10% or greater than or equal to 0.3 mean variation in BMI z-score after 1 year experienced long-lasting, clinically significant benefit after 3 years. The finding supports the long-term use of setmelanotide for this group.

“We feared that setmelanotide’s effectiveness would decrease over time, but after 3 years, this had not happened, and we are hopeful that this sustained efficacy will be long lasting. The first two patients who took the drug in 2016 have not noticed any loss of efficacy as it stands,” said Dr. Dubern.

This is all the more encouraging. In the study presented at the 2023 pediatric conference, setmelanotide’s safety profile was reassuring, and it was consistent with previous studies. Side effects reported in greater than or equal to 15% of patients include injection site reactions, skin hyperpigmentation, nausea, diarrhea, mood disturbances, abdominal pain, vomiting, gastroenteritis, and spontaneous erection.

In addition to the lack of control group, Dr. Dubern acknowledged one other constraint of this study. “Only the patients who responded to treatment with setmelanotide during early-phase trials (85.7%) were enrolled.”

Dr. Dubern summarized the clinical implications: “In patients with early-onset obesity, starting before 5 years of age, doctors should really be considering the possibility that genetics might be involved in such cases. For confirmation and to seek expert opinion, specialist obesity clinics can be found throughout France. Additionally, the INSERM NutriOmics research team headed by Prof Karine Clément, MD, PhD, Sorbonne University, in conjunction with Prof Christine Poitou, MD, PhD, has developed a diagnostic tool [called] ObsGen for practitioners faced with patients with potentially genetic causes of obesity. We can answer any questions they have about the likelihood of a particular patient having a genetic form of obesity and guide their next steps. Treating patients with genetic obesity early on helps limit the condition worsening during adolescence, prevents related complications, and can reduce the stigmatization and suffering experienced by these people. It’s a huge issue. A clinical trial with setmelanotide is currently being carried out in children over 2 years of age.”
 

Hypothalamic obesity

During the pediatric conference, another speaker presented the results of a phase 2 study that evaluated the efficacy and tolerability of setmelanotide as a new treatment for hypothalamic obesity. Lesions in the hypothalamus can alter melanocortin 4 receptor pathway signaling and thus lead to hypothalamic obesity. Eighteen patients aged 6-40 years with a BMI greater than or equal to the 95th percentile (for patients aged 6-18 years) or greater than or equal to 35 kg/m² (for adults aged ≥ 18 years) and hypothalamic obesity (craniopharyngioma or other benign brain tumors, surgical removal, and/or chemotherapy) were enrolled. A significant proportion of patients achieved a reduction of greater than or equal to 5% of their BMI (n = 16, 88.9%, CI 90%, 69%-89%, P < .0001), and 72.2% achieved a reduction of greater than or equal to 10% by week 16. The mean change in BMI was −14.9% (9.6%, n = 17). These early results may justify further studies of setmelanotide in treating hypothalamic obesity.

Dr. Dubern has collaborated with Rhythm Pharmaceuticals and Novo Nordisk.

This article was translated from the Medscape French Edition and a version appeared on Medscape.com.

MARSEILLE, FRANCE – Setmelanotide can lead to significant weight loss that lasts for at least 3 years, according to results presented at the latest French Pediatric Society conference. The treatment is effective for adults and children alike.

Setmelanotide is the culmination of two decades of research involving the identification of genes involved in early-onset obesity and the characterization of the melanocortin 4 receptor. It became available via early access in 2021.

Currently limited to use in treating obesity linked to a biallelic POMC/PCSK1 or LEPR deficiency, setmelanotide is being tested with respect to other mutations responsible for severe obesity, raising hopes that it will soon be indicated for use in a larger number of patients.

Fewer than 1% of patients who suffer from severe obesity have monogenic forms of obesity. In recent years, the hope for a targeted treatment for patients with these monogenic forms has become a reality.

Although only a small number of patients currently meet the criteria for setmelanotide treatment (namely, those with obesity linked to a biallelic POMC/PCSK1 enzyme or LEPR deficiency and patients with Bardet-Biedl syndrome), there is a real hope that patients with other forms of severe obesity will be able to benefit from this product, including those with heterozygous (not just homozygous) monoallelic variants, who account for more than 10% of patients with severe early-onset obesity.
 

Restoring satiety signaling

“Setmelanotide is a melanocortin 4 receptor agonist,” said Béatrice Dubern, MD, PhD, pediatrician at Trousseau Hospital, Paris, and member of the French medical research institute (INSERM)/Sorbonne University team on nutrition and obesity. “Its mode of action rests on activation of the leptin-melanocortin signaling pathway in the hypothalamus, which regulates hunger, satiety, energy expenditure, and, therefore, body weight. Rare genetic variants in the leptin-melanocortin pathway are associated with polyphagia and severe early-onset obesity. It is believed that more than 60 genes involved in this leptin-melanocortin pathway are currently associated with obesity.”

In July 2021, the European Medicines Agency approved setmelanotide for daily use via subcutaneous administration.
 

Weight loss maintained

In phase 3 studies, setmelanotide (melanocortin 4 receptor agonist) demonstrated its effectiveness in reducing weight and hunger for patients with obesity caused by a POMC/PCSK1 or LEPR deficiency.

Twenty-four patients aged 6 years and older showed a significant response to setmelanotide after 1 year of treatment and were included in the extension study. “Significant response” was defined as a reduction in body weight greater than or equal to 10% after 52 weeks for patients aged 18 years and older or a reduction in body mass index (BMI) z-score greater than or equal to 0.3 after 52 weeks for patients younger than 18 years.

Among all patients, the mean variation (standard deviation) in BMI was −24.8% (8.2%, n = 24), −21% (13%, n = 23), and −24% (17.9%, n = 15) at 12, 24, and 36 months, respectively.

For patients aged greater than or equal to 18 years (n = 11), the mean variation (standard deviation) in weight was −25.1% (7.7%, n = 11), −22.9% (12.5%, n = 11), and −24.4% (13.2%, n = 8) at 12, 24, and 36 months, respectively.

For children and adolescents (patients aged < 18 years, n = 13), the mean reduction (standard deviation) in BMI z-score was −1.31 ([0.66], n = 13), −1.10 ([0.79], n = 11), and −1.01 (1.22], n = 4) at 12, 24, and 36 months, respectively.

For patients younger than 18 years, the mean variation in BMI z-score was −1.01 SD after three years on setmelanotide (standard deviation, 1.22 [n = 4]). The mean BMI z-score was +2.42 SD (standard deviation, 1.22 [n = 4]) after 3 years of treatment with setmelanotide.

In sum, the patients who achieved a reduction in body weight of at least 10% or greater than or equal to 0.3 mean variation in BMI z-score after 1 year experienced long-lasting, clinically significant benefit after 3 years. The finding supports the long-term use of setmelanotide for this group.

“We feared that setmelanotide’s effectiveness would decrease over time, but after 3 years, this had not happened, and we are hopeful that this sustained efficacy will be long lasting. The first two patients who took the drug in 2016 have not noticed any loss of efficacy as it stands,” said Dr. Dubern.

This is all the more encouraging. In the study presented at the 2023 pediatric conference, setmelanotide’s safety profile was reassuring, and it was consistent with previous studies. Side effects reported in greater than or equal to 15% of patients include injection site reactions, skin hyperpigmentation, nausea, diarrhea, mood disturbances, abdominal pain, vomiting, gastroenteritis, and spontaneous erection.

In addition to the lack of control group, Dr. Dubern acknowledged one other constraint of this study. “Only the patients who responded to treatment with setmelanotide during early-phase trials (85.7%) were enrolled.”

Dr. Dubern summarized the clinical implications: “In patients with early-onset obesity, starting before 5 years of age, doctors should really be considering the possibility that genetics might be involved in such cases. For confirmation and to seek expert opinion, specialist obesity clinics can be found throughout France. Additionally, the INSERM NutriOmics research team headed by Prof Karine Clément, MD, PhD, Sorbonne University, in conjunction with Prof Christine Poitou, MD, PhD, has developed a diagnostic tool [called] ObsGen for practitioners faced with patients with potentially genetic causes of obesity. We can answer any questions they have about the likelihood of a particular patient having a genetic form of obesity and guide their next steps. Treating patients with genetic obesity early on helps limit the condition worsening during adolescence, prevents related complications, and can reduce the stigmatization and suffering experienced by these people. It’s a huge issue. A clinical trial with setmelanotide is currently being carried out in children over 2 years of age.”
 

Hypothalamic obesity

During the pediatric conference, another speaker presented the results of a phase 2 study that evaluated the efficacy and tolerability of setmelanotide as a new treatment for hypothalamic obesity. Lesions in the hypothalamus can alter melanocortin 4 receptor pathway signaling and thus lead to hypothalamic obesity. Eighteen patients aged 6-40 years with a BMI greater than or equal to the 95th percentile (for patients aged 6-18 years) or greater than or equal to 35 kg/m² (for adults aged ≥ 18 years) and hypothalamic obesity (craniopharyngioma or other benign brain tumors, surgical removal, and/or chemotherapy) were enrolled. A significant proportion of patients achieved a reduction of greater than or equal to 5% of their BMI (n = 16, 88.9%, CI 90%, 69%-89%, P < .0001), and 72.2% achieved a reduction of greater than or equal to 10% by week 16. The mean change in BMI was −14.9% (9.6%, n = 17). These early results may justify further studies of setmelanotide in treating hypothalamic obesity.

Dr. Dubern has collaborated with Rhythm Pharmaceuticals and Novo Nordisk.

This article was translated from the Medscape French Edition and a version appeared on Medscape.com.

MARSEILLE, FRANCE – Setmelanotide can lead to significant weight loss that lasts for at least 3 years, according to results presented at the latest French Pediatric Society conference. The treatment is effective for adults and children alike.

Setmelanotide is the culmination of two decades of research involving the identification of genes involved in early-onset obesity and the characterization of the melanocortin 4 receptor. It became available via early access in 2021.

Currently limited to use in treating obesity linked to a biallelic POMC/PCSK1 or LEPR deficiency, setmelanotide is being tested with respect to other mutations responsible for severe obesity, raising hopes that it will soon be indicated for use in a larger number of patients.

Fewer than 1% of patients who suffer from severe obesity have monogenic forms of obesity. In recent years, the hope for a targeted treatment for patients with these monogenic forms has become a reality.

Although only a small number of patients currently meet the criteria for setmelanotide treatment (namely, those with obesity linked to a biallelic POMC/PCSK1 enzyme or LEPR deficiency and patients with Bardet-Biedl syndrome), there is a real hope that patients with other forms of severe obesity will be able to benefit from this product, including those with heterozygous (not just homozygous) monoallelic variants, who account for more than 10% of patients with severe early-onset obesity.
 

Restoring satiety signaling

“Setmelanotide is a melanocortin 4 receptor agonist,” said Béatrice Dubern, MD, PhD, pediatrician at Trousseau Hospital, Paris, and member of the French medical research institute (INSERM)/Sorbonne University team on nutrition and obesity. “Its mode of action rests on activation of the leptin-melanocortin signaling pathway in the hypothalamus, which regulates hunger, satiety, energy expenditure, and, therefore, body weight. Rare genetic variants in the leptin-melanocortin pathway are associated with polyphagia and severe early-onset obesity. It is believed that more than 60 genes involved in this leptin-melanocortin pathway are currently associated with obesity.”

In July 2021, the European Medicines Agency approved setmelanotide for daily use via subcutaneous administration.
 

Weight loss maintained

In phase 3 studies, setmelanotide (melanocortin 4 receptor agonist) demonstrated its effectiveness in reducing weight and hunger for patients with obesity caused by a POMC/PCSK1 or LEPR deficiency.

Twenty-four patients aged 6 years and older showed a significant response to setmelanotide after 1 year of treatment and were included in the extension study. “Significant response” was defined as a reduction in body weight greater than or equal to 10% after 52 weeks for patients aged 18 years and older or a reduction in body mass index (BMI) z-score greater than or equal to 0.3 after 52 weeks for patients younger than 18 years.

Among all patients, the mean variation (standard deviation) in BMI was −24.8% (8.2%, n = 24), −21% (13%, n = 23), and −24% (17.9%, n = 15) at 12, 24, and 36 months, respectively.

For patients aged greater than or equal to 18 years (n = 11), the mean variation (standard deviation) in weight was −25.1% (7.7%, n = 11), −22.9% (12.5%, n = 11), and −24.4% (13.2%, n = 8) at 12, 24, and 36 months, respectively.

For children and adolescents (patients aged < 18 years, n = 13), the mean reduction (standard deviation) in BMI z-score was −1.31 ([0.66], n = 13), −1.10 ([0.79], n = 11), and −1.01 (1.22], n = 4) at 12, 24, and 36 months, respectively.

For patients younger than 18 years, the mean variation in BMI z-score was −1.01 SD after three years on setmelanotide (standard deviation, 1.22 [n = 4]). The mean BMI z-score was +2.42 SD (standard deviation, 1.22 [n = 4]) after 3 years of treatment with setmelanotide.

In sum, the patients who achieved a reduction in body weight of at least 10% or greater than or equal to 0.3 mean variation in BMI z-score after 1 year experienced long-lasting, clinically significant benefit after 3 years. The finding supports the long-term use of setmelanotide for this group.

“We feared that setmelanotide’s effectiveness would decrease over time, but after 3 years, this had not happened, and we are hopeful that this sustained efficacy will be long lasting. The first two patients who took the drug in 2016 have not noticed any loss of efficacy as it stands,” said Dr. Dubern.

This is all the more encouraging. In the study presented at the 2023 pediatric conference, setmelanotide’s safety profile was reassuring, and it was consistent with previous studies. Side effects reported in greater than or equal to 15% of patients include injection site reactions, skin hyperpigmentation, nausea, diarrhea, mood disturbances, abdominal pain, vomiting, gastroenteritis, and spontaneous erection.

In addition to the lack of control group, Dr. Dubern acknowledged one other constraint of this study. “Only the patients who responded to treatment with setmelanotide during early-phase trials (85.7%) were enrolled.”

Dr. Dubern summarized the clinical implications: “In patients with early-onset obesity, starting before 5 years of age, doctors should really be considering the possibility that genetics might be involved in such cases. For confirmation and to seek expert opinion, specialist obesity clinics can be found throughout France. Additionally, the INSERM NutriOmics research team headed by Prof Karine Clément, MD, PhD, Sorbonne University, in conjunction with Prof Christine Poitou, MD, PhD, has developed a diagnostic tool [called] ObsGen for practitioners faced with patients with potentially genetic causes of obesity. We can answer any questions they have about the likelihood of a particular patient having a genetic form of obesity and guide their next steps. Treating patients with genetic obesity early on helps limit the condition worsening during adolescence, prevents related complications, and can reduce the stigmatization and suffering experienced by these people. It’s a huge issue. A clinical trial with setmelanotide is currently being carried out in children over 2 years of age.”
 

Hypothalamic obesity

During the pediatric conference, another speaker presented the results of a phase 2 study that evaluated the efficacy and tolerability of setmelanotide as a new treatment for hypothalamic obesity. Lesions in the hypothalamus can alter melanocortin 4 receptor pathway signaling and thus lead to hypothalamic obesity. Eighteen patients aged 6-40 years with a BMI greater than or equal to the 95th percentile (for patients aged 6-18 years) or greater than or equal to 35 kg/m² (for adults aged ≥ 18 years) and hypothalamic obesity (craniopharyngioma or other benign brain tumors, surgical removal, and/or chemotherapy) were enrolled. A significant proportion of patients achieved a reduction of greater than or equal to 5% of their BMI (n = 16, 88.9%, CI 90%, 69%-89%, P < .0001), and 72.2% achieved a reduction of greater than or equal to 10% by week 16. The mean change in BMI was −14.9% (9.6%, n = 17). These early results may justify further studies of setmelanotide in treating hypothalamic obesity.

Dr. Dubern has collaborated with Rhythm Pharmaceuticals and Novo Nordisk.

This article was translated from the Medscape French Edition and a version appeared on Medscape.com.

What is a healthy weight? A definitive answer to this seemingly innocent question continues to evade the medical community. In 1832, Belgian statistician Adolphe Quetelet introduced the concept of body mass index (BMI) – one’s weight (in kilograms) divided by the square of one’s height (in meters) as a measurement of ideal body weight. Approximately 140 years later, nutritional epidemiologist Ancel Keys proposed the use of BMI as a surrogate marker for evaluating body fat percentage within a population.

For the past 50 years, the scientific and medical communities have relied on BMI as a research and study tool to categorize patients’ weight (that is, severely underweight, underweight, normal weight, overweight, and obesity). The World Health Organization, National Institutes of Health, and U.S. Centers for Disease Control and Prevention use the following BMI weight classifications for adult patients:

• Underweight: BMI < 18.5
• Normal weight: BMI ≥ 18.5 to 24.9
• Overweight: BMI ≥ 25 to 29.9
• Obesity: BMI ≥ 30

Of note, BMI categories for children and adolescents (aged 2-19 years) are based on sex- and age-specific percentiles and will not be addressed in this article.

BMI appears to be a straightforward, easy, and cost-effective way to identify “healthy” weight and assess a patient’s risk for related conditions. For example, studies show that a BMI ≥ 35 kg/m² correlates to higher prevalence of type 2 diabetes, hypertension, dyslipidemia, and decreased lifespan. At least 13 types of cancer have been linked to obesity, regardless of dietary or physical activity behaviors. While the health dangers associated with BMI ≥ 35 are substantial and difficult to dispute, concerns arise when BMI alone is used to determine healthy weight and disease risk in patients with a BMI of 25-35.
 

BMI limitations

There are troubling limitations to using BMI alone to assess a patient’s weight and health status. BMI only takes into account a patient’s height and weight, neither of which are sole determinants of health. Moreover, BMI measurements do not distinguish between fat mass and fat-free mass, each of which has very distinct effects on health. High fat mass is associated with an increased risk for disease and mortality, while higher lean body mass correlates with increased physical fitness and longevity. BMI also does not consider age, sex, race, ethnicity, or types of adipose tissue, all of which tremendously influence disease risk across all BMI categories.

Body composition and adipose tissue

Body composition and type of excess adipose tissue better correlate disease risk than does BMI. The World Health Organization defines obesity as having a body fat percentage > 25% for men and > 35% for women. Body composition can be measured by skin-fold thickness, bioelectrical impedance, dual-energy x-ray absorptiometry (DXA), CT, or MRI.

A cross-sectional study by Shah and colleagues) comparing BMI and DXA found that BMI underestimated obesity prevalence. In the study, BMI characterized 26% of participants as obese while DXA (a direct measurement of fat) characterized 64%. Further, 39% of patients categorized as nonobese based on BMI were found to be obese on DXA. Also, BMI misclassified 25% of men and 48% of women in the study. These findings and those of other studies suggest that BMI has a high specificity but low sensitivity for diagnosing obesity, questioning its reliability as a clinical screening tool.

Current guideline recommendations on pharmacologic and surgical treatment options for patients with overweight or obesity, including those of the American Association of Clinical Endocrinology and American College of Endocrinology (AACE/ACE) and the American College of Cardiology/American Heart Association and The Obesity Society (ACC/AHA/TOS), rely on BMI, diminishing their utilization. For example, a recent literature search by Li and associates found that Asian American patients with lower BMIs and BMIs of 25 or 27 are at increased risk for metabolic disease. On the basis of study findings, some organizations recommend considering pharmacotherapy at a lower BMI cutoff of ≥ 25.0 or ≥ 27.5 for Asian people to ensure early treatment intervention in this patient population because guidelines do not recommend pharmacologic treatment unless the BMI is 27 with weight-related complications or 30. Under the current guidelines, a patient of Asian descent has greater disease severity with potentially more complications by the time pharmacotherapy is initiated.

As previously noted, body composition, which requires the use of special equipment (skinfold calipers, DXA, CT, MRI, body impedance scale), best captures the ratio of fat mass to fat-free mass. DXA is frequently used in research studies looking at body composition because of its lower cost, faster time to obtain the study, and ability to measure bone density. MRI has been found to be as accurate as CT for assessing visceral adipose tissue (VAT), skeletal muscle mass, and organ mass, and does not expose patients to ionizing radiation like CT does. MRI clinical use, however, is limited because of its high cost, and it may be problematic for patients with claustrophobia or who are unable to remain immobile for an extended period.

Patients with a high VAT mass, compared with subcutaneous adipose tissue (SAT), are at increased risk for metabolic syndrome, nonalcoholic fatty liver disease, and cardiovascular disease regardless of BMI, underscoring the clinical usefulness of measuring visceral adiposity over BMI.

One of the barriers to implementing VAT assessment in clinical practice is the cost of imaging studies. Fortunately, data suggest that waist circumference and/or waist-to-hip ratio measurements can be a valuable surrogate for VAT measurement. A waist circumference greater than 35 inches (88 cm) or a waist-to-hip ratio greater than 0.8 for women, and greater than 40 inches (102 cm) or a waist-to-hip ratio greater than 0.95 for men, increases metabolic disease risk. Obtaining these measurements requires a tape measure and a few extra minutes and offers more potent data than BMI alone. For example, a large cardiometabolic study found that within each BMI category, increasing gender-specific waist circumferences were associated with significantly higher VAT, liver fat, and a more harmful cardiometabolic risk profile. Men and women with a lower or normal BMI and a high waist circumference are at greatest relative health risk, compared with those with low waist circumference values. Yet, using the BMI alone in these patients would not raise any clinical concern, which is a missed opportunity for cardiometabolic risk reduction.
 

Biomarkers

Specific biomarkers are closely related to obesity. Leptin and resistin protein levels increase with adipose mass, while adiponectin decreases, probably contributing to insulin resistance. The higher levels of tumor necrosis factor–alpha and interleukin-6 from obesity contribute to chronic inflammation. The combined effect of chronic inflammation and insulin resistance allows greater bioavailability of insulinlike growth factor-1 (IGF-1), which has a role in initiating type 2 diabetes, cardiovascular disease, and cancer. Ideally, measuring these biomarkers could provide more advantageous information than BMI. Unfortunately, for now, the lack of standardized assays and imperfect knowledge of exactly how these biomarkers elicit disease prevents clinical use.

Obesity is a common, highly complex, chronic, and relapsing disease. Thankfully, a number of effective treatments and interventions are available. Although an accurate diagnosis of obesity is essential, underdiagnosed cases and missed opportunities for metabolic disease risk reduction persist. Overdiagnosing obesity, however, has the potential to incur unnecessary health care costs and result in weight bias and stigma.

While BMI is a quick and inexpensive means to assess obesity, by itself it lacks the necessary components for an accurate diagnosis. Particularly for individuals with a normal BMI or less severe overweight/obesity (BMI 27-34.9), other factors must be accounted for, including age, gender, and race. At a minimum, waist circumference should be measured to best risk-stratify and determine treatment intensity. Body composition analysis with BMI calculation refines the diagnosis of obesity.

Finally, clinicians may find best practices by using BMI delta change models. As with so many other clinical measurements, the trajectory tells the most astute story. For example, a patient whose BMI decreased from 45 to 35 may warrant less intensive treatment than a patient whose BMI increased from 26 to 31. Any change in BMI warrants clinical attention. A rapidly or consistently increasing BMI, even within normal range, should prompt clinicians to assess other factors related to obesity and metabolic disease risk (for example, lifestyle factors, waist circumference, blood pressure, cholesterol, diabetes screening) and initiate a conversation about weight management. Similarly, a consistently or rapidly decreasing BMI – even in elevated ranges and particularly with unintentional weight loss – should prompt evaluation.

Although BMI continues to be useful in clinical practice, epidemiology, and research, it should be used in combination with other clinical factors to provide the utmost quality of care.

Dr. Bartfield is assistant professor, obesity medicine specialist, Wake Forest Baptists Medical Center/Atrium Health Weight Management Center, Greensboro, N.C. She has disclosed no relevant financial relationships.

A version of this article appeared on Medscape.com.

What is a healthy weight? A definitive answer to this seemingly innocent question continues to evade the medical community. In 1832, Belgian statistician Adolphe Quetelet introduced the concept of body mass index (BMI) – one’s weight (in kilograms) divided by the square of one’s height (in meters) as a measurement of ideal body weight. Approximately 140 years later, nutritional epidemiologist Ancel Keys proposed the use of BMI as a surrogate marker for evaluating body fat percentage within a population.

For the past 50 years, the scientific and medical communities have relied on BMI as a research and study tool to categorize patients’ weight (that is, severely underweight, underweight, normal weight, overweight, and obesity). The World Health Organization, National Institutes of Health, and U.S. Centers for Disease Control and Prevention use the following BMI weight classifications for adult patients:

• Underweight: BMI < 18.5
• Normal weight: BMI ≥ 18.5 to 24.9
• Overweight: BMI ≥ 25 to 29.9
• Obesity: BMI ≥ 30

Of note, BMI categories for children and adolescents (aged 2-19 years) are based on sex- and age-specific percentiles and will not be addressed in this article.

BMI appears to be a straightforward, easy, and cost-effective way to identify “healthy” weight and assess a patient’s risk for related conditions. For example, studies show that a BMI ≥ 35 kg/m² correlates to higher prevalence of type 2 diabetes, hypertension, dyslipidemia, and decreased lifespan. At least 13 types of cancer have been linked to obesity, regardless of dietary or physical activity behaviors. While the health dangers associated with BMI ≥ 35 are substantial and difficult to dispute, concerns arise when BMI alone is used to determine healthy weight and disease risk in patients with a BMI of 25-35.
 

BMI limitations

There are troubling limitations to using BMI alone to assess a patient’s weight and health status. BMI only takes into account a patient’s height and weight, neither of which are sole determinants of health. Moreover, BMI measurements do not distinguish between fat mass and fat-free mass, each of which has very distinct effects on health. High fat mass is associated with an increased risk for disease and mortality, while higher lean body mass correlates with increased physical fitness and longevity. BMI also does not consider age, sex, race, ethnicity, or types of adipose tissue, all of which tremendously influence disease risk across all BMI categories.

Body composition and adipose tissue

Body composition and type of excess adipose tissue better correlate disease risk than does BMI. The World Health Organization defines obesity as having a body fat percentage > 25% for men and > 35% for women. Body composition can be measured by skin-fold thickness, bioelectrical impedance, dual-energy x-ray absorptiometry (DXA), CT, or MRI.

A cross-sectional study by Shah and colleagues) comparing BMI and DXA found that BMI underestimated obesity prevalence. In the study, BMI characterized 26% of participants as obese while DXA (a direct measurement of fat) characterized 64%. Further, 39% of patients categorized as nonobese based on BMI were found to be obese on DXA. Also, BMI misclassified 25% of men and 48% of women in the study. These findings and those of other studies suggest that BMI has a high specificity but low sensitivity for diagnosing obesity, questioning its reliability as a clinical screening tool.

Current guideline recommendations on pharmacologic and surgical treatment options for patients with overweight or obesity, including those of the American Association of Clinical Endocrinology and American College of Endocrinology (AACE/ACE) and the American College of Cardiology/American Heart Association and The Obesity Society (ACC/AHA/TOS), rely on BMI, diminishing their utilization. For example, a recent literature search by Li and associates found that Asian American patients with lower BMIs and BMIs of 25 or 27 are at increased risk for metabolic disease. On the basis of study findings, some organizations recommend considering pharmacotherapy at a lower BMI cutoff of ≥ 25.0 or ≥ 27.5 for Asian people to ensure early treatment intervention in this patient population because guidelines do not recommend pharmacologic treatment unless the BMI is 27 with weight-related complications or 30. Under the current guidelines, a patient of Asian descent has greater disease severity with potentially more complications by the time pharmacotherapy is initiated.

As previously noted, body composition, which requires the use of special equipment (skinfold calipers, DXA, CT, MRI, body impedance scale), best captures the ratio of fat mass to fat-free mass. DXA is frequently used in research studies looking at body composition because of its lower cost, faster time to obtain the study, and ability to measure bone density. MRI has been found to be as accurate as CT for assessing visceral adipose tissue (VAT), skeletal muscle mass, and organ mass, and does not expose patients to ionizing radiation like CT does. MRI clinical use, however, is limited because of its high cost, and it may be problematic for patients with claustrophobia or who are unable to remain immobile for an extended period.

Patients with a high VAT mass, compared with subcutaneous adipose tissue (SAT), are at increased risk for metabolic syndrome, nonalcoholic fatty liver disease, and cardiovascular disease regardless of BMI, underscoring the clinical usefulness of measuring visceral adiposity over BMI.

One of the barriers to implementing VAT assessment in clinical practice is the cost of imaging studies. Fortunately, data suggest that waist circumference and/or waist-to-hip ratio measurements can be a valuable surrogate for VAT measurement. A waist circumference greater than 35 inches (88 cm) or a waist-to-hip ratio greater than 0.8 for women, and greater than 40 inches (102 cm) or a waist-to-hip ratio greater than 0.95 for men, increases metabolic disease risk. Obtaining these measurements requires a tape measure and a few extra minutes and offers more potent data than BMI alone. For example, a large cardiometabolic study found that within each BMI category, increasing gender-specific waist circumferences were associated with significantly higher VAT, liver fat, and a more harmful cardiometabolic risk profile. Men and women with a lower or normal BMI and a high waist circumference are at greatest relative health risk, compared with those with low waist circumference values. Yet, using the BMI alone in these patients would not raise any clinical concern, which is a missed opportunity for cardiometabolic risk reduction.
 

Biomarkers

Specific biomarkers are closely related to obesity. Leptin and resistin protein levels increase with adipose mass, while adiponectin decreases, probably contributing to insulin resistance. The higher levels of tumor necrosis factor–alpha and interleukin-6 from obesity contribute to chronic inflammation. The combined effect of chronic inflammation and insulin resistance allows greater bioavailability of insulinlike growth factor-1 (IGF-1), which has a role in initiating type 2 diabetes, cardiovascular disease, and cancer. Ideally, measuring these biomarkers could provide more advantageous information than BMI. Unfortunately, for now, the lack of standardized assays and imperfect knowledge of exactly how these biomarkers elicit disease prevents clinical use.

Obesity is a common, highly complex, chronic, and relapsing disease. Thankfully, a number of effective treatments and interventions are available. Although an accurate diagnosis of obesity is essential, underdiagnosed cases and missed opportunities for metabolic disease risk reduction persist. Overdiagnosing obesity, however, has the potential to incur unnecessary health care costs and result in weight bias and stigma.

While BMI is a quick and inexpensive means to assess obesity, by itself it lacks the necessary components for an accurate diagnosis. Particularly for individuals with a normal BMI or less severe overweight/obesity (BMI 27-34.9), other factors must be accounted for, including age, gender, and race. At a minimum, waist circumference should be measured to best risk-stratify and determine treatment intensity. Body composition analysis with BMI calculation refines the diagnosis of obesity.

Finally, clinicians may find best practices by using BMI delta change models. As with so many other clinical measurements, the trajectory tells the most astute story. For example, a patient whose BMI decreased from 45 to 35 may warrant less intensive treatment than a patient whose BMI increased from 26 to 31. Any change in BMI warrants clinical attention. A rapidly or consistently increasing BMI, even within normal range, should prompt clinicians to assess other factors related to obesity and metabolic disease risk (for example, lifestyle factors, waist circumference, blood pressure, cholesterol, diabetes screening) and initiate a conversation about weight management. Similarly, a consistently or rapidly decreasing BMI – even in elevated ranges and particularly with unintentional weight loss – should prompt evaluation.

Although BMI continues to be useful in clinical practice, epidemiology, and research, it should be used in combination with other clinical factors to provide the utmost quality of care.

Dr. Bartfield is assistant professor, obesity medicine specialist, Wake Forest Baptists Medical Center/Atrium Health Weight Management Center, Greensboro, N.C. She has disclosed no relevant financial relationships.

A version of this article appeared on Medscape.com.

What is a healthy weight? A definitive answer to this seemingly innocent question continues to evade the medical community. In 1832, Belgian statistician Adolphe Quetelet introduced the concept of body mass index (BMI) – one’s weight (in kilograms) divided by the square of one’s height (in meters) as a measurement of ideal body weight. Approximately 140 years later, nutritional epidemiologist Ancel Keys proposed the use of BMI as a surrogate marker for evaluating body fat percentage within a population.

For the past 50 years, the scientific and medical communities have relied on BMI as a research and study tool to categorize patients’ weight (that is, severely underweight, underweight, normal weight, overweight, and obesity). The World Health Organization, National Institutes of Health, and U.S. Centers for Disease Control and Prevention use the following BMI weight classifications for adult patients:

• Underweight: BMI < 18.5
• Normal weight: BMI ≥ 18.5 to 24.9
• Overweight: BMI ≥ 25 to 29.9
• Obesity: BMI ≥ 30

Of note, BMI categories for children and adolescents (aged 2-19 years) are based on sex- and age-specific percentiles and will not be addressed in this article.

BMI appears to be a straightforward, easy, and cost-effective way to identify “healthy” weight and assess a patient’s risk for related conditions. For example, studies show that a BMI ≥ 35 kg/m² correlates to higher prevalence of type 2 diabetes, hypertension, dyslipidemia, and decreased lifespan. At least 13 types of cancer have been linked to obesity, regardless of dietary or physical activity behaviors. While the health dangers associated with BMI ≥ 35 are substantial and difficult to dispute, concerns arise when BMI alone is used to determine healthy weight and disease risk in patients with a BMI of 25-35.
 

BMI limitations

There are troubling limitations to using BMI alone to assess a patient’s weight and health status. BMI only takes into account a patient’s height and weight, neither of which are sole determinants of health. Moreover, BMI measurements do not distinguish between fat mass and fat-free mass, each of which has very distinct effects on health. High fat mass is associated with an increased risk for disease and mortality, while higher lean body mass correlates with increased physical fitness and longevity. BMI also does not consider age, sex, race, ethnicity, or types of adipose tissue, all of which tremendously influence disease risk across all BMI categories.

Body composition and adipose tissue

Body composition and type of excess adipose tissue better correlate disease risk than does BMI. The World Health Organization defines obesity as having a body fat percentage > 25% for men and > 35% for women. Body composition can be measured by skin-fold thickness, bioelectrical impedance, dual-energy x-ray absorptiometry (DXA), CT, or MRI.

A cross-sectional study by Shah and colleagues) comparing BMI and DXA found that BMI underestimated obesity prevalence. In the study, BMI characterized 26% of participants as obese while DXA (a direct measurement of fat) characterized 64%. Further, 39% of patients categorized as nonobese based on BMI were found to be obese on DXA. Also, BMI misclassified 25% of men and 48% of women in the study. These findings and those of other studies suggest that BMI has a high specificity but low sensitivity for diagnosing obesity, questioning its reliability as a clinical screening tool.

Current guideline recommendations on pharmacologic and surgical treatment options for patients with overweight or obesity, including those of the American Association of Clinical Endocrinology and American College of Endocrinology (AACE/ACE) and the American College of Cardiology/American Heart Association and The Obesity Society (ACC/AHA/TOS), rely on BMI, diminishing their utilization. For example, a recent literature search by Li and associates found that Asian American patients with lower BMIs and BMIs of 25 or 27 are at increased risk for metabolic disease. On the basis of study findings, some organizations recommend considering pharmacotherapy at a lower BMI cutoff of ≥ 25.0 or ≥ 27.5 for Asian people to ensure early treatment intervention in this patient population because guidelines do not recommend pharmacologic treatment unless the BMI is 27 with weight-related complications or 30. Under the current guidelines, a patient of Asian descent has greater disease severity with potentially more complications by the time pharmacotherapy is initiated.

As previously noted, body composition, which requires the use of special equipment (skinfold calipers, DXA, CT, MRI, body impedance scale), best captures the ratio of fat mass to fat-free mass. DXA is frequently used in research studies looking at body composition because of its lower cost, faster time to obtain the study, and ability to measure bone density. MRI has been found to be as accurate as CT for assessing visceral adipose tissue (VAT), skeletal muscle mass, and organ mass, and does not expose patients to ionizing radiation like CT does. MRI clinical use, however, is limited because of its high cost, and it may be problematic for patients with claustrophobia or who are unable to remain immobile for an extended period.

Patients with a high VAT mass, compared with subcutaneous adipose tissue (SAT), are at increased risk for metabolic syndrome, nonalcoholic fatty liver disease, and cardiovascular disease regardless of BMI, underscoring the clinical usefulness of measuring visceral adiposity over BMI.

One of the barriers to implementing VAT assessment in clinical practice is the cost of imaging studies. Fortunately, data suggest that waist circumference and/or waist-to-hip ratio measurements can be a valuable surrogate for VAT measurement. A waist circumference greater than 35 inches (88 cm) or a waist-to-hip ratio greater than 0.8 for women, and greater than 40 inches (102 cm) or a waist-to-hip ratio greater than 0.95 for men, increases metabolic disease risk. Obtaining these measurements requires a tape measure and a few extra minutes and offers more potent data than BMI alone. For example, a large cardiometabolic study found that within each BMI category, increasing gender-specific waist circumferences were associated with significantly higher VAT, liver fat, and a more harmful cardiometabolic risk profile. Men and women with a lower or normal BMI and a high waist circumference are at greatest relative health risk, compared with those with low waist circumference values. Yet, using the BMI alone in these patients would not raise any clinical concern, which is a missed opportunity for cardiometabolic risk reduction.
 

Biomarkers

Specific biomarkers are closely related to obesity. Leptin and resistin protein levels increase with adipose mass, while adiponectin decreases, probably contributing to insulin resistance. The higher levels of tumor necrosis factor–alpha and interleukin-6 from obesity contribute to chronic inflammation. The combined effect of chronic inflammation and insulin resistance allows greater bioavailability of insulinlike growth factor-1 (IGF-1), which has a role in initiating type 2 diabetes, cardiovascular disease, and cancer. Ideally, measuring these biomarkers could provide more advantageous information than BMI. Unfortunately, for now, the lack of standardized assays and imperfect knowledge of exactly how these biomarkers elicit disease prevents clinical use.

Obesity is a common, highly complex, chronic, and relapsing disease. Thankfully, a number of effective treatments and interventions are available. Although an accurate diagnosis of obesity is essential, underdiagnosed cases and missed opportunities for metabolic disease risk reduction persist. Overdiagnosing obesity, however, has the potential to incur unnecessary health care costs and result in weight bias and stigma.

While BMI is a quick and inexpensive means to assess obesity, by itself it lacks the necessary components for an accurate diagnosis. Particularly for individuals with a normal BMI or less severe overweight/obesity (BMI 27-34.9), other factors must be accounted for, including age, gender, and race. At a minimum, waist circumference should be measured to best risk-stratify and determine treatment intensity. Body composition analysis with BMI calculation refines the diagnosis of obesity.

Finally, clinicians may find best practices by using BMI delta change models. As with so many other clinical measurements, the trajectory tells the most astute story. For example, a patient whose BMI decreased from 45 to 35 may warrant less intensive treatment than a patient whose BMI increased from 26 to 31. Any change in BMI warrants clinical attention. A rapidly or consistently increasing BMI, even within normal range, should prompt clinicians to assess other factors related to obesity and metabolic disease risk (for example, lifestyle factors, waist circumference, blood pressure, cholesterol, diabetes screening) and initiate a conversation about weight management. Similarly, a consistently or rapidly decreasing BMI – even in elevated ranges and particularly with unintentional weight loss – should prompt evaluation.

Although BMI continues to be useful in clinical practice, epidemiology, and research, it should be used in combination with other clinical factors to provide the utmost quality of care.

Dr. Bartfield is assistant professor, obesity medicine specialist, Wake Forest Baptists Medical Center/Atrium Health Weight Management Center, Greensboro, N.C. She has disclosed no relevant financial relationships.

A version of this article appeared on Medscape.com.

New data show that sleeve gastrectomy, but not Roux-en-Y gastric bypass, is linked with better disease-specific outcomes in morbidly obese patients who have inflammatory bowel disease (IBD).

Previous studies have shown that bariatric surgery is safe for people with IBD, but there have been few long-term data on whether the weight loss improves disease outcomes for that population, said lead author Aakash Desai, MD, from the division of gastroenterology and hepatology at Case Western Reserve University, Cleveland, in an interview.

Gastroenterologists are often hesitant to pursue bariatric surgery in patients with IBD because of potential complications from taking immunosuppressive medications, Dr. Desai added.

“We hope that this encourages providers caring for patients with IBD to make a referral to a weight loss specialist who can evaluate whether they would be candidates for bariatric surgery,” he said.

The findings from Dr. Desai and co-authors were published online in the Journal of Clinical Gastroenterology.
 

Outcomes compared with and without surgery

The prevalence of obesity in patients with IBD ranges from 15% to 40%, the authors note.

And although obesity is a risk factor for IBD disease severity and clinical outcomes, studies on its influence on disease outcomes in patients with IBD have reported conflicting results. The effect of bariatric surgery, an antiobesity intervention, on IBD outcomes also has not been well understood, the authors write.

To evaluate the effect of bariatric surgery on IBD, the researchers compared outcomes in patients living with IBD and morbid obesity who had bariatric surgery versus those in patients living with both conditions who had not had surgery. The retrospective, propensity score–matched cohort study used de-identified U.S. data on 473 patients and 473 controls from TriNetX, a diverse, population-based research network of health care organizations.

The primary endpoint was a composite of disease-related complications. The composite included a disease flare that resulted in hospitalization requiring an intravenous steroid or major IBD-related surgery within 2 years.

Researchers found that the surgery group had a lower risk (adjusted odds ratio, 0.31; 95% confidence interval, 0.17-0.56) for a composite of IBD-related complications, compared with controls.

Looking at the impact of bariatric surgery type, they found that patients who had a sleeve gastrectomy had a decreased risk (aOR, 0.45; 95% CI, 0.31-0.66) for the composite of IBD-related complications. There was no significant difference in the risk (aOR, 0.77; 95% CI, 0.45-1.31) for composite IBD-related complications between the Roux-en-Y gastric bypass group and controls.

As to why sleeve gastrectomy can improve outcomes with IBD, the authors write that “studies have shown a decrease in the low chronic pro-inflammatory state associated with obesity with reductions in C-reactive protein, TNF-α, and IL-6 following weight loss after [bariatric surgery].”

The authors add that another reason could be that the decrease from surgery in adipose tissue hypertrophy and ectopic fat around the bowel may help regulate intestinal inflammation in Crohn’s disease and “may affect the need for rescue therapy with intravenous steroids, failure/escalation of therapy, and risk of surgery.”
 

Study helps confirm benefits of weight loss

Ali Aminian, MD, director of the Bariatric and Metabolic Institute at the Cleveland Clinic, said this study furthers understanding because it used a large national database and helps confirm findings from smaller cohorts regarding the benefit of large weight loss for patients with IBD.

“Obesity can worsen the severity of inflammatory conditions,” he said in an interview, so it can be hard for gastroenterologists to help patients with obesity to control their IBD symptoms. Dr. Aminian has previously published research on the relationship between IBD and obesity.

“Telling the patient to eat less or exercise probably won’t help,” he said, adding that this study helps make the case for either bariatric surgery or new weight loss medications that have demonstrated significant effect.

Dr. Aminian said this study showed a dramatic benefit after bariatric surgery for IBD patients, but some questions need further study.

“Ideally, we need to have prospective clinical trials with a good control group and accurate endoscopy findings” to get a true long-term picture of the weight loss effect on IBD, he said.

Dr. Desai reports no relevant financial relationships. Co-author Farraye serves on advisory boards for Braintree, BMS, GI Reviewers, GSK, IBD Educational Group, Iterative Health, Janssen, Pfizer, and Sebela and is on the data safety monitoring board for Adiso Therapeutics. Co-author Kochhar serves on the advisory boards for Lilly Pharmaceuticals, CorEvitas Research Foundation, and GIE Medical and has stock options with Digbi Health. Aminian receives research support and speaking honoraria from Medtronic and Ethicon.

A version of this article appeared on Medscape.com.

New data show that sleeve gastrectomy, but not Roux-en-Y gastric bypass, is linked with better disease-specific outcomes in morbidly obese patients who have inflammatory bowel disease (IBD).

Previous studies have shown that bariatric surgery is safe for people with IBD, but there have been few long-term data on whether the weight loss improves disease outcomes for that population, said lead author Aakash Desai, MD, from the division of gastroenterology and hepatology at Case Western Reserve University, Cleveland, in an interview.

Gastroenterologists are often hesitant to pursue bariatric surgery in patients with IBD because of potential complications from taking immunosuppressive medications, Dr. Desai added.

“We hope that this encourages providers caring for patients with IBD to make a referral to a weight loss specialist who can evaluate whether they would be candidates for bariatric surgery,” he said.

The findings from Dr. Desai and co-authors were published online in the Journal of Clinical Gastroenterology.
 

Outcomes compared with and without surgery

The prevalence of obesity in patients with IBD ranges from 15% to 40%, the authors note.

And although obesity is a risk factor for IBD disease severity and clinical outcomes, studies on its influence on disease outcomes in patients with IBD have reported conflicting results. The effect of bariatric surgery, an antiobesity intervention, on IBD outcomes also has not been well understood, the authors write.

To evaluate the effect of bariatric surgery on IBD, the researchers compared outcomes in patients living with IBD and morbid obesity who had bariatric surgery versus those in patients living with both conditions who had not had surgery. The retrospective, propensity score–matched cohort study used de-identified U.S. data on 473 patients and 473 controls from TriNetX, a diverse, population-based research network of health care organizations.

The primary endpoint was a composite of disease-related complications. The composite included a disease flare that resulted in hospitalization requiring an intravenous steroid or major IBD-related surgery within 2 years.

Researchers found that the surgery group had a lower risk (adjusted odds ratio, 0.31; 95% confidence interval, 0.17-0.56) for a composite of IBD-related complications, compared with controls.

Looking at the impact of bariatric surgery type, they found that patients who had a sleeve gastrectomy had a decreased risk (aOR, 0.45; 95% CI, 0.31-0.66) for the composite of IBD-related complications. There was no significant difference in the risk (aOR, 0.77; 95% CI, 0.45-1.31) for composite IBD-related complications between the Roux-en-Y gastric bypass group and controls.

As to why sleeve gastrectomy can improve outcomes with IBD, the authors write that “studies have shown a decrease in the low chronic pro-inflammatory state associated with obesity with reductions in C-reactive protein, TNF-α, and IL-6 following weight loss after [bariatric surgery].”

The authors add that another reason could be that the decrease from surgery in adipose tissue hypertrophy and ectopic fat around the bowel may help regulate intestinal inflammation in Crohn’s disease and “may affect the need for rescue therapy with intravenous steroids, failure/escalation of therapy, and risk of surgery.”
 

Study helps confirm benefits of weight loss

Ali Aminian, MD, director of the Bariatric and Metabolic Institute at the Cleveland Clinic, said this study furthers understanding because it used a large national database and helps confirm findings from smaller cohorts regarding the benefit of large weight loss for patients with IBD.

“Obesity can worsen the severity of inflammatory conditions,” he said in an interview, so it can be hard for gastroenterologists to help patients with obesity to control their IBD symptoms. Dr. Aminian has previously published research on the relationship between IBD and obesity.

“Telling the patient to eat less or exercise probably won’t help,” he said, adding that this study helps make the case for either bariatric surgery or new weight loss medications that have demonstrated significant effect.

Dr. Aminian said this study showed a dramatic benefit after bariatric surgery for IBD patients, but some questions need further study.

“Ideally, we need to have prospective clinical trials with a good control group and accurate endoscopy findings” to get a true long-term picture of the weight loss effect on IBD, he said.

Dr. Desai reports no relevant financial relationships. Co-author Farraye serves on advisory boards for Braintree, BMS, GI Reviewers, GSK, IBD Educational Group, Iterative Health, Janssen, Pfizer, and Sebela and is on the data safety monitoring board for Adiso Therapeutics. Co-author Kochhar serves on the advisory boards for Lilly Pharmaceuticals, CorEvitas Research Foundation, and GIE Medical and has stock options with Digbi Health. Aminian receives research support and speaking honoraria from Medtronic and Ethicon.

A version of this article appeared on Medscape.com.

New data show that sleeve gastrectomy, but not Roux-en-Y gastric bypass, is linked with better disease-specific outcomes in morbidly obese patients who have inflammatory bowel disease (IBD).

Previous studies have shown that bariatric surgery is safe for people with IBD, but there have been few long-term data on whether the weight loss improves disease outcomes for that population, said lead author Aakash Desai, MD, from the division of gastroenterology and hepatology at Case Western Reserve University, Cleveland, in an interview.

Gastroenterologists are often hesitant to pursue bariatric surgery in patients with IBD because of potential complications from taking immunosuppressive medications, Dr. Desai added.

“We hope that this encourages providers caring for patients with IBD to make a referral to a weight loss specialist who can evaluate whether they would be candidates for bariatric surgery,” he said.

The findings from Dr. Desai and co-authors were published online in the Journal of Clinical Gastroenterology.
 

Outcomes compared with and without surgery

The prevalence of obesity in patients with IBD ranges from 15% to 40%, the authors note.

And although obesity is a risk factor for IBD disease severity and clinical outcomes, studies on its influence on disease outcomes in patients with IBD have reported conflicting results. The effect of bariatric surgery, an antiobesity intervention, on IBD outcomes also has not been well understood, the authors write.

To evaluate the effect of bariatric surgery on IBD, the researchers compared outcomes in patients living with IBD and morbid obesity who had bariatric surgery versus those in patients living with both conditions who had not had surgery. The retrospective, propensity score–matched cohort study used de-identified U.S. data on 473 patients and 473 controls from TriNetX, a diverse, population-based research network of health care organizations.

The primary endpoint was a composite of disease-related complications. The composite included a disease flare that resulted in hospitalization requiring an intravenous steroid or major IBD-related surgery within 2 years.

Researchers found that the surgery group had a lower risk (adjusted odds ratio, 0.31; 95% confidence interval, 0.17-0.56) for a composite of IBD-related complications, compared with controls.

Looking at the impact of bariatric surgery type, they found that patients who had a sleeve gastrectomy had a decreased risk (aOR, 0.45; 95% CI, 0.31-0.66) for the composite of IBD-related complications. There was no significant difference in the risk (aOR, 0.77; 95% CI, 0.45-1.31) for composite IBD-related complications between the Roux-en-Y gastric bypass group and controls.

As to why sleeve gastrectomy can improve outcomes with IBD, the authors write that “studies have shown a decrease in the low chronic pro-inflammatory state associated with obesity with reductions in C-reactive protein, TNF-α, and IL-6 following weight loss after [bariatric surgery].”

The authors add that another reason could be that the decrease from surgery in adipose tissue hypertrophy and ectopic fat around the bowel may help regulate intestinal inflammation in Crohn’s disease and “may affect the need for rescue therapy with intravenous steroids, failure/escalation of therapy, and risk of surgery.”
 

Study helps confirm benefits of weight loss

Ali Aminian, MD, director of the Bariatric and Metabolic Institute at the Cleveland Clinic, said this study furthers understanding because it used a large national database and helps confirm findings from smaller cohorts regarding the benefit of large weight loss for patients with IBD.

“Obesity can worsen the severity of inflammatory conditions,” he said in an interview, so it can be hard for gastroenterologists to help patients with obesity to control their IBD symptoms. Dr. Aminian has previously published research on the relationship between IBD and obesity.

“Telling the patient to eat less or exercise probably won’t help,” he said, adding that this study helps make the case for either bariatric surgery or new weight loss medications that have demonstrated significant effect.

Dr. Aminian said this study showed a dramatic benefit after bariatric surgery for IBD patients, but some questions need further study.

“Ideally, we need to have prospective clinical trials with a good control group and accurate endoscopy findings” to get a true long-term picture of the weight loss effect on IBD, he said.

Dr. Desai reports no relevant financial relationships. Co-author Farraye serves on advisory boards for Braintree, BMS, GI Reviewers, GSK, IBD Educational Group, Iterative Health, Janssen, Pfizer, and Sebela and is on the data safety monitoring board for Adiso Therapeutics. Co-author Kochhar serves on the advisory boards for Lilly Pharmaceuticals, CorEvitas Research Foundation, and GIE Medical and has stock options with Digbi Health. Aminian receives research support and speaking honoraria from Medtronic and Ethicon.

A version of this article appeared on Medscape.com.

Berberine, a plant-derived compound historically used in traditional Chinese medicine, is experiencing increased popularity thanks to social media, especially TikTok, where the hashtag #berberine has more than 75 million views at the time of this writing. Social media influencers are promoting the compound, calling it “nature’s Ozempic,” saying they lost weight taking the supplement.

Off-the-shelf berberine comes as a yellow-orange powder usually encased in a capsule or mixed into tablet form. It’s extracted from the roots, stems, and leaves of various plants, including goldenseal and barberry.

Its use is additionally promoted for insulin resistance, polycystic ovary syndrome, and even cancer, but medical experts are warning potential users that it lacks robust evidence to support its use.

“There’s not that much data on it,” says Reshmi Srinath, MD, director of the Mount Sinai weight and metabolism management program, New York. “It’s sort of shocking now that it’s popped up into the media, to be frank.”

In response to berberine’s online popularity, the National Center for Complementary and Integrative Health issued a warning, stating that “there isn’t enough rigorous scientific evidence to determine whether it is effective.”
 

Overstated claims, lack of scientific research?

Other endocrinologists and weight management experts agree. “The claims are pretty overstated when it comes to the impact on weight loss, based on the evidence in the literature that’s currently available,” says Jaime Almandoz, MD, medical director of the UT Southwestern Medical Center, Dallas, weight wellness program.

A review of 12 randomized controlled trials evaluating berberine’s effects on obesity concluded that the treatment moderately decreased body weight. The trials included were conducted over only a few months and had small numbers of participants, and weight loss was not the primary outcome measure.

“There are few randomized controlled trials,” says Ivania Rizo, MD, an endocrinologist at Boston University. “It appears that they all have some low quality of methods which essentially can lead to an increased risk of bias.”

Another review, of 35 studies – most of them on animals and human cells and similarly underpowered – concluded that berberine showed promise for reducing blood glucose. A separate study found that berberine treatment actually increased the body weight and appetite of rats.

How exactly berberine elicits these effects is not entirely clear. Several studies point to its activation of AMP-activated protein kinase, which improves glucose tolerance in rats, as the mechanism for weight loss. Metformin, a drug used to improve glycemic control in people with type 2 diabetes, works in a similar way. Other researchers have hypothesized a link between berberine and the gut microbiome to explain its effect on type 2 diabetes and weight loss, though the clinical data to substantiate this link are shaky.

“I caution my patients about dietary supplements for weight management because we do not have high-quality data demonstrating efficacy,” Katherine Saunders, MD, DABOM, an obesity expert and cofounder of Intellihealth, a platform for obesity management, said in an email.
 

Experimenting with berberine

Despite the lack of substantial evidence supporting berberine’s use for weight management and obesity, interest in the supplement seems to be increasing. One reason could be that lifestyle interventions aren’t sufficient for most people with obesity to lose a significant amount of weight, with many requiring medical intervention, according to Dr. Saunders.

But access to treatment providers is limited. “As a result, it is not uncommon for individuals with obesity to experiment with dietary supplements like berberine,” she observed.

Dr. Srinath, the Mount Sinai doctor, says many patients have asked for her thoughts on berberine as a weight loss supplement. “I say, you know, it’s something you’re welcome to try, but we don’t have enough data at this time to recommend it.”

The hype surrounding the supplement isn’t all that surprising. About 42% of adults in the United States have obesity, according to 2019-2023 National Health and Nutrition Examination Survey data, pointing to a serious need for accessible drugs to address the condition. Berberine is available over the counter and is far cheaper than most of the newer U.S. Food and Drug Administration–approved drugs for weight loss.

Wegovy, semaglutide approved to treat obesity, can cost as much as $1,300 per package; and Ozempic, semaglutide approved to treat type 2 diabetes, can cost more than $1,000 per month. “That’s a very steep price to pay,” says Dr. Srinath.

Many insurance companies won’t cover the drugs, curbing access to Americans who need them, says Dr. Almandoz. Federally sponsored programs such as Medicare and Medicaid also don’t cover the drugs, which are approved for obesity and weight management. “That’s been a huge hole in our health care system,” says Dr. Srinath. “That’s sort of what’s been driving interest in supplements and things like that.”

Among adults trying to lose weight, only about 3% said they took prescription medication for weight loss, according to a report from the U.S. Government Accountability Office. This report includes 2013-2016 data, predating Wegovy’s approval for chronic weight management.

“These classes are notorious for being quite pricey and not well covered by insurance,” says Dr. Almandoz. “It’s easy to see why someone would promote something that someone may have more access to.”

Comparing Ozempic or Wegovy with berberine can be misleading. Those drugs work by mimicking the effect of the hormone GLP-1 to help reduce appetite.

A clinical trial assessing the efficacy of semaglutide found that adults with obesity who took the drug for 68 weeks lost approximately 15% of their body weight in combination with lifestyle changes. The FDA approval was based on this trial and three others that showed similarly substantial reductions in weight.

The trials also document the many side effects of taking the drugs, primarily gastrointestinal in nature. The short- and long-term effects of berberine, on the other hand, are less clear. Some of the clinical trials reported diarrhea and stomach upset as the most common adverse effects.

Its perception as a naturally derived option for weight loss, though, might encourage people to overlook the potential interactions that berberine could have with other drugs, according to Dr. Almandoz.

He says clinicians considering natural products or nutraceuticals for patients should check for potential side effects and find reliable database sources to determine any potential medication interactions for patients. But the unregulated nature of berberine makes this challenging, Dr. Almandoz adds.

The dosage, formulations, and quality of berberine vary in each study and each product because supplements don’t need to pass through the checks and balances of the FDA to land on shelves.

The lack of regulation could incentivize some companies to add stimulants to enhance any weight loss effect that the supplement may have. Those additives might interact with other health conditions or cause side effects like anxiety, says Dr. Almandoz.

Berberine should also not be taken during pregnancy or while breastfeeding, and it is unsafe for young children; in newborns and children, the supplement can cause higher levels of bilirubin in the blood, worsening any jaundice at birth and posing a greater risk for kernicterus.

Dr. Rizo urges patients, before they ask for berberine, to first ask for safe and effective interventions they can access. “I don’t want to have people not use effective interventions that are currently available to them, and instead use something that needs to be better studied and needs to be better regulated,” she says.

While the “nature’s Ozempic” catchphrase could be drawing in potential users with its dubious comparison, berberine’s escalating popularity might also be a symptom of people seeking a quick fix, the experts worry.

“That’s my fear,” says Dr. Srinath. “ ‘Let me get this medicine, let me lose the weight fast,’ but at the end of the day, weight management is a long-term journey. It takes time, it takes effort, it is not easy, and there is no quick fix.”

This is another concern for doctors; for people who’ve struggled with losing weight for years, not seeing results from berberine could feel like another failure.

“It will give them another opportunity to feel like they are being unsuccessful or that they are failing at weight loss again,” says Dr. Almandoz. “It feeds into the hopelessness that many people with obesity have around their weight management.”

A version of this article first appeared on Medscape.com.

Berberine, a plant-derived compound historically used in traditional Chinese medicine, is experiencing increased popularity thanks to social media, especially TikTok, where the hashtag #berberine has more than 75 million views at the time of this writing. Social media influencers are promoting the compound, calling it “nature’s Ozempic,” saying they lost weight taking the supplement.

Off-the-shelf berberine comes as a yellow-orange powder usually encased in a capsule or mixed into tablet form. It’s extracted from the roots, stems, and leaves of various plants, including goldenseal and barberry.

Its use is additionally promoted for insulin resistance, polycystic ovary syndrome, and even cancer, but medical experts are warning potential users that it lacks robust evidence to support its use.

“There’s not that much data on it,” says Reshmi Srinath, MD, director of the Mount Sinai weight and metabolism management program, New York. “It’s sort of shocking now that it’s popped up into the media, to be frank.”

In response to berberine’s online popularity, the National Center for Complementary and Integrative Health issued a warning, stating that “there isn’t enough rigorous scientific evidence to determine whether it is effective.”
 

Overstated claims, lack of scientific research?

Other endocrinologists and weight management experts agree. “The claims are pretty overstated when it comes to the impact on weight loss, based on the evidence in the literature that’s currently available,” says Jaime Almandoz, MD, medical director of the UT Southwestern Medical Center, Dallas, weight wellness program.

A review of 12 randomized controlled trials evaluating berberine’s effects on obesity concluded that the treatment moderately decreased body weight. The trials included were conducted over only a few months and had small numbers of participants, and weight loss was not the primary outcome measure.

“There are few randomized controlled trials,” says Ivania Rizo, MD, an endocrinologist at Boston University. “It appears that they all have some low quality of methods which essentially can lead to an increased risk of bias.”

Another review, of 35 studies – most of them on animals and human cells and similarly underpowered – concluded that berberine showed promise for reducing blood glucose. A separate study found that berberine treatment actually increased the body weight and appetite of rats.

How exactly berberine elicits these effects is not entirely clear. Several studies point to its activation of AMP-activated protein kinase, which improves glucose tolerance in rats, as the mechanism for weight loss. Metformin, a drug used to improve glycemic control in people with type 2 diabetes, works in a similar way. Other researchers have hypothesized a link between berberine and the gut microbiome to explain its effect on type 2 diabetes and weight loss, though the clinical data to substantiate this link are shaky.

“I caution my patients about dietary supplements for weight management because we do not have high-quality data demonstrating efficacy,” Katherine Saunders, MD, DABOM, an obesity expert and cofounder of Intellihealth, a platform for obesity management, said in an email.
 

Experimenting with berberine

Despite the lack of substantial evidence supporting berberine’s use for weight management and obesity, interest in the supplement seems to be increasing. One reason could be that lifestyle interventions aren’t sufficient for most people with obesity to lose a significant amount of weight, with many requiring medical intervention, according to Dr. Saunders.

But access to treatment providers is limited. “As a result, it is not uncommon for individuals with obesity to experiment with dietary supplements like berberine,” she observed.

Dr. Srinath, the Mount Sinai doctor, says many patients have asked for her thoughts on berberine as a weight loss supplement. “I say, you know, it’s something you’re welcome to try, but we don’t have enough data at this time to recommend it.”

The hype surrounding the supplement isn’t all that surprising. About 42% of adults in the United States have obesity, according to 2019-2023 National Health and Nutrition Examination Survey data, pointing to a serious need for accessible drugs to address the condition. Berberine is available over the counter and is far cheaper than most of the newer U.S. Food and Drug Administration–approved drugs for weight loss.

Wegovy, semaglutide approved to treat obesity, can cost as much as $1,300 per package; and Ozempic, semaglutide approved to treat type 2 diabetes, can cost more than $1,000 per month. “That’s a very steep price to pay,” says Dr. Srinath.

Many insurance companies won’t cover the drugs, curbing access to Americans who need them, says Dr. Almandoz. Federally sponsored programs such as Medicare and Medicaid also don’t cover the drugs, which are approved for obesity and weight management. “That’s been a huge hole in our health care system,” says Dr. Srinath. “That’s sort of what’s been driving interest in supplements and things like that.”

Among adults trying to lose weight, only about 3% said they took prescription medication for weight loss, according to a report from the U.S. Government Accountability Office. This report includes 2013-2016 data, predating Wegovy’s approval for chronic weight management.

“These classes are notorious for being quite pricey and not well covered by insurance,” says Dr. Almandoz. “It’s easy to see why someone would promote something that someone may have more access to.”

Comparing Ozempic or Wegovy with berberine can be misleading. Those drugs work by mimicking the effect of the hormone GLP-1 to help reduce appetite.

A clinical trial assessing the efficacy of semaglutide found that adults with obesity who took the drug for 68 weeks lost approximately 15% of their body weight in combination with lifestyle changes. The FDA approval was based on this trial and three others that showed similarly substantial reductions in weight.

The trials also document the many side effects of taking the drugs, primarily gastrointestinal in nature. The short- and long-term effects of berberine, on the other hand, are less clear. Some of the clinical trials reported diarrhea and stomach upset as the most common adverse effects.

Its perception as a naturally derived option for weight loss, though, might encourage people to overlook the potential interactions that berberine could have with other drugs, according to Dr. Almandoz.

He says clinicians considering natural products or nutraceuticals for patients should check for potential side effects and find reliable database sources to determine any potential medication interactions for patients. But the unregulated nature of berberine makes this challenging, Dr. Almandoz adds.

The dosage, formulations, and quality of berberine vary in each study and each product because supplements don’t need to pass through the checks and balances of the FDA to land on shelves.

The lack of regulation could incentivize some companies to add stimulants to enhance any weight loss effect that the supplement may have. Those additives might interact with other health conditions or cause side effects like anxiety, says Dr. Almandoz.

Berberine should also not be taken during pregnancy or while breastfeeding, and it is unsafe for young children; in newborns and children, the supplement can cause higher levels of bilirubin in the blood, worsening any jaundice at birth and posing a greater risk for kernicterus.

Dr. Rizo urges patients, before they ask for berberine, to first ask for safe and effective interventions they can access. “I don’t want to have people not use effective interventions that are currently available to them, and instead use something that needs to be better studied and needs to be better regulated,” she says.

While the “nature’s Ozempic” catchphrase could be drawing in potential users with its dubious comparison, berberine’s escalating popularity might also be a symptom of people seeking a quick fix, the experts worry.

“That’s my fear,” says Dr. Srinath. “ ‘Let me get this medicine, let me lose the weight fast,’ but at the end of the day, weight management is a long-term journey. It takes time, it takes effort, it is not easy, and there is no quick fix.”

This is another concern for doctors; for people who’ve struggled with losing weight for years, not seeing results from berberine could feel like another failure.

“It will give them another opportunity to feel like they are being unsuccessful or that they are failing at weight loss again,” says Dr. Almandoz. “It feeds into the hopelessness that many people with obesity have around their weight management.”

A version of this article first appeared on Medscape.com.

Berberine, a plant-derived compound historically used in traditional Chinese medicine, is experiencing increased popularity thanks to social media, especially TikTok, where the hashtag #berberine has more than 75 million views at the time of this writing. Social media influencers are promoting the compound, calling it “nature’s Ozempic,” saying they lost weight taking the supplement.

Off-the-shelf berberine comes as a yellow-orange powder usually encased in a capsule or mixed into tablet form. It’s extracted from the roots, stems, and leaves of various plants, including goldenseal and barberry.

Its use is additionally promoted for insulin resistance, polycystic ovary syndrome, and even cancer, but medical experts are warning potential users that it lacks robust evidence to support its use.

“There’s not that much data on it,” says Reshmi Srinath, MD, director of the Mount Sinai weight and metabolism management program, New York. “It’s sort of shocking now that it’s popped up into the media, to be frank.”

In response to berberine’s online popularity, the National Center for Complementary and Integrative Health issued a warning, stating that “there isn’t enough rigorous scientific evidence to determine whether it is effective.”
 

Overstated claims, lack of scientific research?

Other endocrinologists and weight management experts agree. “The claims are pretty overstated when it comes to the impact on weight loss, based on the evidence in the literature that’s currently available,” says Jaime Almandoz, MD, medical director of the UT Southwestern Medical Center, Dallas, weight wellness program.

A review of 12 randomized controlled trials evaluating berberine’s effects on obesity concluded that the treatment moderately decreased body weight. The trials included were conducted over only a few months and had small numbers of participants, and weight loss was not the primary outcome measure.

“There are few randomized controlled trials,” says Ivania Rizo, MD, an endocrinologist at Boston University. “It appears that they all have some low quality of methods which essentially can lead to an increased risk of bias.”

Another review, of 35 studies – most of them on animals and human cells and similarly underpowered – concluded that berberine showed promise for reducing blood glucose. A separate study found that berberine treatment actually increased the body weight and appetite of rats.

How exactly berberine elicits these effects is not entirely clear. Several studies point to its activation of AMP-activated protein kinase, which improves glucose tolerance in rats, as the mechanism for weight loss. Metformin, a drug used to improve glycemic control in people with type 2 diabetes, works in a similar way. Other researchers have hypothesized a link between berberine and the gut microbiome to explain its effect on type 2 diabetes and weight loss, though the clinical data to substantiate this link are shaky.

“I caution my patients about dietary supplements for weight management because we do not have high-quality data demonstrating efficacy,” Katherine Saunders, MD, DABOM, an obesity expert and cofounder of Intellihealth, a platform for obesity management, said in an email.
 

Experimenting with berberine

Despite the lack of substantial evidence supporting berberine’s use for weight management and obesity, interest in the supplement seems to be increasing. One reason could be that lifestyle interventions aren’t sufficient for most people with obesity to lose a significant amount of weight, with many requiring medical intervention, according to Dr. Saunders.

But access to treatment providers is limited. “As a result, it is not uncommon for individuals with obesity to experiment with dietary supplements like berberine,” she observed.

Dr. Srinath, the Mount Sinai doctor, says many patients have asked for her thoughts on berberine as a weight loss supplement. “I say, you know, it’s something you’re welcome to try, but we don’t have enough data at this time to recommend it.”

The hype surrounding the supplement isn’t all that surprising. About 42% of adults in the United States have obesity, according to 2019-2023 National Health and Nutrition Examination Survey data, pointing to a serious need for accessible drugs to address the condition. Berberine is available over the counter and is far cheaper than most of the newer U.S. Food and Drug Administration–approved drugs for weight loss.

Wegovy, semaglutide approved to treat obesity, can cost as much as $1,300 per package; and Ozempic, semaglutide approved to treat type 2 diabetes, can cost more than $1,000 per month. “That’s a very steep price to pay,” says Dr. Srinath.

Many insurance companies won’t cover the drugs, curbing access to Americans who need them, says Dr. Almandoz. Federally sponsored programs such as Medicare and Medicaid also don’t cover the drugs, which are approved for obesity and weight management. “That’s been a huge hole in our health care system,” says Dr. Srinath. “That’s sort of what’s been driving interest in supplements and things like that.”

Among adults trying to lose weight, only about 3% said they took prescription medication for weight loss, according to a report from the U.S. Government Accountability Office. This report includes 2013-2016 data, predating Wegovy’s approval for chronic weight management.

“These classes are notorious for being quite pricey and not well covered by insurance,” says Dr. Almandoz. “It’s easy to see why someone would promote something that someone may have more access to.”

Comparing Ozempic or Wegovy with berberine can be misleading. Those drugs work by mimicking the effect of the hormone GLP-1 to help reduce appetite.

A clinical trial assessing the efficacy of semaglutide found that adults with obesity who took the drug for 68 weeks lost approximately 15% of their body weight in combination with lifestyle changes. The FDA approval was based on this trial and three others that showed similarly substantial reductions in weight.

The trials also document the many side effects of taking the drugs, primarily gastrointestinal in nature. The short- and long-term effects of berberine, on the other hand, are less clear. Some of the clinical trials reported diarrhea and stomach upset as the most common adverse effects.

Its perception as a naturally derived option for weight loss, though, might encourage people to overlook the potential interactions that berberine could have with other drugs, according to Dr. Almandoz.

He says clinicians considering natural products or nutraceuticals for patients should check for potential side effects and find reliable database sources to determine any potential medication interactions for patients. But the unregulated nature of berberine makes this challenging, Dr. Almandoz adds.

The dosage, formulations, and quality of berberine vary in each study and each product because supplements don’t need to pass through the checks and balances of the FDA to land on shelves.

The lack of regulation could incentivize some companies to add stimulants to enhance any weight loss effect that the supplement may have. Those additives might interact with other health conditions or cause side effects like anxiety, says Dr. Almandoz.

Berberine should also not be taken during pregnancy or while breastfeeding, and it is unsafe for young children; in newborns and children, the supplement can cause higher levels of bilirubin in the blood, worsening any jaundice at birth and posing a greater risk for kernicterus.

Dr. Rizo urges patients, before they ask for berberine, to first ask for safe and effective interventions they can access. “I don’t want to have people not use effective interventions that are currently available to them, and instead use something that needs to be better studied and needs to be better regulated,” she says.

While the “nature’s Ozempic” catchphrase could be drawing in potential users with its dubious comparison, berberine’s escalating popularity might also be a symptom of people seeking a quick fix, the experts worry.

“That’s my fear,” says Dr. Srinath. “ ‘Let me get this medicine, let me lose the weight fast,’ but at the end of the day, weight management is a long-term journey. It takes time, it takes effort, it is not easy, and there is no quick fix.”

This is another concern for doctors; for people who’ve struggled with losing weight for years, not seeing results from berberine could feel like another failure.

“It will give them another opportunity to feel like they are being unsuccessful or that they are failing at weight loss again,” says Dr. Almandoz. “It feeds into the hopelessness that many people with obesity have around their weight management.”

A version of this article first appeared on Medscape.com.

Following reports that the European Medicines Agency is looking into instances of suicide or self-harm after patients took the weight loss drugs semaglutide or liraglutide, the manufacturer, Novo Nordisk, issued a statement to this news organization in which it says it “remains confident in the benefit risk profile of the products and remains committed to ensuring patient safety.”

U.S. experts say they haven’t personally seen this adverse effect in any patients except for one isolated case. An increase in suicidal ideation, particularly among younger people, has been reported following bariatric surgery for weight loss.

In the United States, the two drugs – both GLP-1 agonists – already come with a warning about the potential for these adverse effects on the branded versions approved for weight loss, Wegovy and Saxenda. (Years earlier, both drugs, marketed as Ozempic and Victoza, were also approved for treatment of type 2 diabetes.)

Of more than 1,200 reports of adverse reactions with semaglutide, 60 cases of suicidal ideation and 7 suicide attempts have been reported since 2018, according to the Food and Drug Administration’s Adverse Event Reporting System (FAERS) public database. For liraglutide, there were 71 cases of suicidal ideation, 28 suicide attempts, and 25 completed suicides out of more than 35,000 reports of adverse reactions.

The FAERS website cautions users that the data may be duplicated or incomplete, that rates of occurrence cannot be established using the data, that reports have not been verified, and that the existence of a report cannot establish causation.

The EMA is looking into about 150 reports of possible cases of self-injury and suicidal thoughts, according to a press release from the agency.

“It is not yet clear whether the reported cases are linked to the medicines themselves or to the patients’ underlying conditions or other factors,” it says. The medicines are widely used in the European Union, according to the press release.

The review of Ozempic, Saxenda, and Wegovy, which started on July 3, 2023, has been extended to include other GLP-1 receptor agonists, which include dulaglutide, exenatide, and lixisenatide. This review is expected to conclude in November 2023.

In a statement, Novo Nordisk did not directly dispute a potential link between the drugs and suicidal ideation.

“In the U.S., FDA requires medications for chronic weight management that work on the central nervous system, including Wegovy and Saxenda, to carry a warning about suicidal behavior and ideation,” the statement indicates. “This event had been reported in clinical trials with other weight management products.”

It adds: “Novo Nordisk is continuously performing surveillance of the data from ongoing clinical trials and real-world use of its products and collaborates closely with the authorities to ensure patient safety and adequate information to healthcare professionals.”
 

Important to know the denominator

“What’s important to know is the denominator,” said Holly Lofton, MD, a clinical associate professor of surgery and medicine and the director of the medical weight management program at NYU Langone, New York. “It needs a denominator with the total population on the medication so we can determine if that’s really a significant risk.”

Dr. Lofton described an isolated, anecdotal case of a patient who had no history of depression or mental health problems but developed suicidal thoughts after taking Saxenda for several months. In that case, the 25-year-old was experiencing problems in a personal relationship and with social media.

Two other weight loss specialists contacted by this news organization had not had patients who had experienced suicidal ideation with the drugs. “These are not very common in practice,” Dr. Lofton said in an interview.

The U.S. prescribing information for Saxenda, which contains liraglutide and has been approved as an adjunct to diet and exercise for chronic weight management, recommends monitoring for the emergence of depression and suicidal thoughts. In the clinical trials, 6 of the 3,384 patients who took the drug reported suicidal ideation; none of the 1,941 patients who received placebo did so, according to the FDA.

Similarly, the U.S. prescribing information for Wegovy, which contains semaglutide, recommends monitoring for the emergence of suicidal thoughts or depression, but this recommendation was based on clinical trials of other weight management products. The prescribing information for Ozempic, the brand name for semaglutide for type 2 diabetes, does not include this recommendation.
 

Is it the weight loss, rather than the meds? Seen with bariatric surgery too

Speculating what the link, if any, might be, Dr. Lofton suggested dopamine release could be playing a role. Small trials in humans as well as animal studies hint at a blunting of dopamine responses to usual triggers – including addictive substances and possibly food – that may also affect mood.

Young people (aged 18-34) who undergo bariatric surgery are at an increased risk of suicide during follow-up compared to their peers who don’t have surgery. And a study found an increase in events involving self-harm after bariatric surgery, especially among patients who already had a mental health disorder.

For a patient who derives comfort from food, not being able to eat in response to a stressful event may lead that patient to act out in more serious ways, according to Dr. Lofton. “That’s why, again, surgical follow-up is so important and their presurgical psychiatric evaluation is so important.”

A version of this article originally appeared on Medscape.com.

Following reports that the European Medicines Agency is looking into instances of suicide or self-harm after patients took the weight loss drugs semaglutide or liraglutide, the manufacturer, Novo Nordisk, issued a statement to this news organization in which it says it “remains confident in the benefit risk profile of the products and remains committed to ensuring patient safety.”

U.S. experts say they haven’t personally seen this adverse effect in any patients except for one isolated case. An increase in suicidal ideation, particularly among younger people, has been reported following bariatric surgery for weight loss.

In the United States, the two drugs – both GLP-1 agonists – already come with a warning about the potential for these adverse effects on the branded versions approved for weight loss, Wegovy and Saxenda. (Years earlier, both drugs, marketed as Ozempic and Victoza, were also approved for treatment of type 2 diabetes.)

Of more than 1,200 reports of adverse reactions with semaglutide, 60 cases of suicidal ideation and 7 suicide attempts have been reported since 2018, according to the Food and Drug Administration’s Adverse Event Reporting System (FAERS) public database. For liraglutide, there were 71 cases of suicidal ideation, 28 suicide attempts, and 25 completed suicides out of more than 35,000 reports of adverse reactions.

The FAERS website cautions users that the data may be duplicated or incomplete, that rates of occurrence cannot be established using the data, that reports have not been verified, and that the existence of a report cannot establish causation.

The EMA is looking into about 150 reports of possible cases of self-injury and suicidal thoughts, according to a press release from the agency.

“It is not yet clear whether the reported cases are linked to the medicines themselves or to the patients’ underlying conditions or other factors,” it says. The medicines are widely used in the European Union, according to the press release.

The review of Ozempic, Saxenda, and Wegovy, which started on July 3, 2023, has been extended to include other GLP-1 receptor agonists, which include dulaglutide, exenatide, and lixisenatide. This review is expected to conclude in November 2023.

In a statement, Novo Nordisk did not directly dispute a potential link between the drugs and suicidal ideation.

“In the U.S., FDA requires medications for chronic weight management that work on the central nervous system, including Wegovy and Saxenda, to carry a warning about suicidal behavior and ideation,” the statement indicates. “This event had been reported in clinical trials with other weight management products.”

It adds: “Novo Nordisk is continuously performing surveillance of the data from ongoing clinical trials and real-world use of its products and collaborates closely with the authorities to ensure patient safety and adequate information to healthcare professionals.”
 

Important to know the denominator

“What’s important to know is the denominator,” said Holly Lofton, MD, a clinical associate professor of surgery and medicine and the director of the medical weight management program at NYU Langone, New York. “It needs a denominator with the total population on the medication so we can determine if that’s really a significant risk.”

Dr. Lofton described an isolated, anecdotal case of a patient who had no history of depression or mental health problems but developed suicidal thoughts after taking Saxenda for several months. In that case, the 25-year-old was experiencing problems in a personal relationship and with social media.

Two other weight loss specialists contacted by this news organization had not had patients who had experienced suicidal ideation with the drugs. “These are not very common in practice,” Dr. Lofton said in an interview.

The U.S. prescribing information for Saxenda, which contains liraglutide and has been approved as an adjunct to diet and exercise for chronic weight management, recommends monitoring for the emergence of depression and suicidal thoughts. In the clinical trials, 6 of the 3,384 patients who took the drug reported suicidal ideation; none of the 1,941 patients who received placebo did so, according to the FDA.

Similarly, the U.S. prescribing information for Wegovy, which contains semaglutide, recommends monitoring for the emergence of suicidal thoughts or depression, but this recommendation was based on clinical trials of other weight management products. The prescribing information for Ozempic, the brand name for semaglutide for type 2 diabetes, does not include this recommendation.
 

Is it the weight loss, rather than the meds? Seen with bariatric surgery too

Speculating what the link, if any, might be, Dr. Lofton suggested dopamine release could be playing a role. Small trials in humans as well as animal studies hint at a blunting of dopamine responses to usual triggers – including addictive substances and possibly food – that may also affect mood.

Young people (aged 18-34) who undergo bariatric surgery are at an increased risk of suicide during follow-up compared to their peers who don’t have surgery. And a study found an increase in events involving self-harm after bariatric surgery, especially among patients who already had a mental health disorder.

For a patient who derives comfort from food, not being able to eat in response to a stressful event may lead that patient to act out in more serious ways, according to Dr. Lofton. “That’s why, again, surgical follow-up is so important and their presurgical psychiatric evaluation is so important.”

A version of this article originally appeared on Medscape.com.

Following reports that the European Medicines Agency is looking into instances of suicide or self-harm after patients took the weight loss drugs semaglutide or liraglutide, the manufacturer, Novo Nordisk, issued a statement to this news organization in which it says it “remains confident in the benefit risk profile of the products and remains committed to ensuring patient safety.”

U.S. experts say they haven’t personally seen this adverse effect in any patients except for one isolated case. An increase in suicidal ideation, particularly among younger people, has been reported following bariatric surgery for weight loss.

In the United States, the two drugs – both GLP-1 agonists – already come with a warning about the potential for these adverse effects on the branded versions approved for weight loss, Wegovy and Saxenda. (Years earlier, both drugs, marketed as Ozempic and Victoza, were also approved for treatment of type 2 diabetes.)

Of more than 1,200 reports of adverse reactions with semaglutide, 60 cases of suicidal ideation and 7 suicide attempts have been reported since 2018, according to the Food and Drug Administration’s Adverse Event Reporting System (FAERS) public database. For liraglutide, there were 71 cases of suicidal ideation, 28 suicide attempts, and 25 completed suicides out of more than 35,000 reports of adverse reactions.

The FAERS website cautions users that the data may be duplicated or incomplete, that rates of occurrence cannot be established using the data, that reports have not been verified, and that the existence of a report cannot establish causation.

The EMA is looking into about 150 reports of possible cases of self-injury and suicidal thoughts, according to a press release from the agency.

“It is not yet clear whether the reported cases are linked to the medicines themselves or to the patients’ underlying conditions or other factors,” it says. The medicines are widely used in the European Union, according to the press release.

The review of Ozempic, Saxenda, and Wegovy, which started on July 3, 2023, has been extended to include other GLP-1 receptor agonists, which include dulaglutide, exenatide, and lixisenatide. This review is expected to conclude in November 2023.

In a statement, Novo Nordisk did not directly dispute a potential link between the drugs and suicidal ideation.

“In the U.S., FDA requires medications for chronic weight management that work on the central nervous system, including Wegovy and Saxenda, to carry a warning about suicidal behavior and ideation,” the statement indicates. “This event had been reported in clinical trials with other weight management products.”

It adds: “Novo Nordisk is continuously performing surveillance of the data from ongoing clinical trials and real-world use of its products and collaborates closely with the authorities to ensure patient safety and adequate information to healthcare professionals.”
 

Important to know the denominator

“What’s important to know is the denominator,” said Holly Lofton, MD, a clinical associate professor of surgery and medicine and the director of the medical weight management program at NYU Langone, New York. “It needs a denominator with the total population on the medication so we can determine if that’s really a significant risk.”

Dr. Lofton described an isolated, anecdotal case of a patient who had no history of depression or mental health problems but developed suicidal thoughts after taking Saxenda for several months. In that case, the 25-year-old was experiencing problems in a personal relationship and with social media.

Two other weight loss specialists contacted by this news organization had not had patients who had experienced suicidal ideation with the drugs. “These are not very common in practice,” Dr. Lofton said in an interview.

The U.S. prescribing information for Saxenda, which contains liraglutide and has been approved as an adjunct to diet and exercise for chronic weight management, recommends monitoring for the emergence of depression and suicidal thoughts. In the clinical trials, 6 of the 3,384 patients who took the drug reported suicidal ideation; none of the 1,941 patients who received placebo did so, according to the FDA.

Similarly, the U.S. prescribing information for Wegovy, which contains semaglutide, recommends monitoring for the emergence of suicidal thoughts or depression, but this recommendation was based on clinical trials of other weight management products. The prescribing information for Ozempic, the brand name for semaglutide for type 2 diabetes, does not include this recommendation.
 

Is it the weight loss, rather than the meds? Seen with bariatric surgery too

Speculating what the link, if any, might be, Dr. Lofton suggested dopamine release could be playing a role. Small trials in humans as well as animal studies hint at a blunting of dopamine responses to usual triggers – including addictive substances and possibly food – that may also affect mood.

Young people (aged 18-34) who undergo bariatric surgery are at an increased risk of suicide during follow-up compared to their peers who don’t have surgery. And a study found an increase in events involving self-harm after bariatric surgery, especially among patients who already had a mental health disorder.

For a patient who derives comfort from food, not being able to eat in response to a stressful event may lead that patient to act out in more serious ways, according to Dr. Lofton. “That’s why, again, surgical follow-up is so important and their presurgical psychiatric evaluation is so important.”

A version of this article originally appeared on Medscape.com.

A teenager who weighed 300 lb and was homeschooled because he was too big to fit in a classroom chair is among the patients Manal Habib, MD, has seen in her pediatric endocrinology practice.

The boy, a social butterfly who hated isolation and blamed himself for his “poor choices,” turned out to have an MC4R mutation that interfered with proper metabolism and satiation signals.

“People often blame obese and overweight people for not having enough willpower, but it’s often a physiological problem,” said Dr. Habib, who works at the University of California, Los Angeles.

She is among the clinicians offering more aggressive forms of weight management, prescribing medications, including metformin, semaglutide, and liraglutide – often off-label – to help children and teens with obesity who do not respond to lifestyle changes.

The results of intensive interventions can be life-changing: The teen Dr. Habib treated is back at school, playing sports, and no longer needs drugs to reduce cholesterol and blood pressure. He now takes a low maintenance dose of a weight-loss medication.

But the long-term effects of these new agents on children and teens are poorly understood, and both medication and surgery are associated with significant complications. Pediatricians treating kids pre- or post-intervention should be alert to a range of physical, psychological, and behavioral risks and complications.
 

Keeping bones healthy

Pediatricians should be aware of the risk to bone health in patients who undergo surgery, according to Misra Madhusmita, MD, chief of pediatric endocrinology at Massachusetts General Hospital in Boston. In a recent study, Dr. Madhusmita and her colleagues found that sleeve gastrectomy reduced vertebral bone strength in adolescents and young adults.

“This is a time of life when bone mass is typically accruing rapidly,” Dr. Madhusmita told this news organization. “A deleterious effect on bone accrual at this time of life raises concerns about suboptimal acquisition of peak bone mass, which is typically attained in early adult life and is a key factor determining bone health and fracture risk in later life.”

Reduced skeletal loading and muscle mass can weaken bones, as can malabsorption of nutrients. Fat loss can trigger lower levels of bioavailable androgens and their subsequent conversion to estrogen, negatively affecting bone density. And sleeve gastrectomy in particular lowers ghrelin, another hormone influencing skeletal health.

Clinicians should advise patients who have had surgery to follow a healthy diet and consume sufficient levels of calcium and vitamin D, said Dr. Madhusmita. Weight-bearing exercises, weight training, and resistance training are also imperative to build bone mass and muscle. Any preexisting conditions or lifestyle factors that weaken the bones should be taken into consideration.
 

Managing expectations

The long-term effects of weight loss medications on children are less documented than with surgery, according to Caren Mangarelli, MD, a former primary care physician who is now medical director of both the adolescent bariatric program and the children’s wellness and weight management clinic at Lurie Children’s Hospital in Chicago, Ill.

But one significant known risk is the potential for rebound weight gain and the complications like high blood pressure and high blood sugar that go with it if the patient stops medication. Dr. Mangarelli said that many clinicians lack the training required to safely facilitate weight loss medications for kids.

“We have to remember that obesity is a chronic disease, especially for those with more severe forms,” she said. “They’re not likely to outgrow it. It’s not like, ‘Oh, we’ll just put a patient on medication, they’ll lose weight, and we’ll take them off of it,’ because you could create a bad cycle of losing weight, followed by metabolism slowing down, hunger cues going up, and weight going back up.”

Making the risks of stopping medication clear and supporting compliance are essential, especially when it comes to injectables like semaglutide, which can be more burdensome than taking pills, requiring weekly subcutaneous injections. Pediatricians should ensure that families understand that medication is a long-term solution, Dr. Habib said.

Many families and patients “want a quick result. They’re focused on a specific size or weight, and they want to take the medication for a short period without changing anything else,” Dr. Habib said.

But children with genetic abnormalities or severe obesity could be on medication for their entire lives. Patients who make significant healthy lifestyle changes have a greater chance of weaning off drug therapy.

But “it’s hard with children because they’re dependent on their family,” Dr. Habib said. “One of the first things that I talk about with families is that it’s very important for everyone to be involved in making healthy changes, especially the parents, because the kids are going to follow their lifestyle and choices, not necessarily what they tell them to do.”
 

The behavioral and mental

One of Dr. Habib’s most striking cases was a 6-year-old patient with autism spectrum disorder experiencing early-onset puberty. Her condition made it difficult for her parents to enforce behavioral and lifestyle changes, making medication the best option to normalize the young girl’s body.

“The goal in this case is not necessarily to help her lose weight, but to prevent her from having severe health risks at such a young age,” said Habib.

Though medication may be the best solution when other options have failed, the ease of using medication may mean clinicians fail to address the complex emotional and psychosocial factors that can both cause and result from obesity.

“A lot of families think that if just this one thing were better, everything else would fall into place,” Habib said. “But there often are multiple layers to treating the patient.”

According to Cambria Garrell, MD, a pediatrician at the UCLA Fit for Healthy Weight Program in Los Angeles, pediatricians should be aware of the psychosocial and mental health factors such as undiagnosed mental illness or family dysfunction.

Dr. Garrell sometimes cares for children with undiagnosed mental health disorders. Children with conditions like attention-deficit/hyperactivity disorder and autism spectrum disorders may struggle with eating because of impulse control and sensory processing issues. Family functioning, issues at school, and lack of sleep are also major contributors to obesity to screen for.

“We really like to think about the environmental and psychosocial factors contributing to obesity instead of just pathologizing the weight,” Dr. Garrell said.
 

Risk for alcohol abuse

Bariatric and metabolic surgeries are associated with an increased risk for alcohol use disorder (AUD). Pediatricians treating children pre- or post-op should ensure that patients receive behavioral and mental health services to minimize the risk for alcohol abuse.

The risk for AUD is likely the result of changes to the way the body metabolizes alcohol, resulting in heightened sensitivity to it, although research is not conclusive, according to Dr. Mangarelli.

The risk for AUD is likely multifactorial, Dr. Mangarelli said.

“We don’t totally understand all of it, but if you’re experiencing a high more easily, that may lead to misuse,” Dr. Mangarelli said. “It’s also important to remember that this population of patients has experienced stigma for a very long time, and they often have associated mental health and body image issues.”

“Those problems don’t disappear on their own,” she added. “You want to make sure that patients are hooked into behavioral and mental health services before surgery so that they have somebody who’s following them after surgery.”

A version of this article first appeared on Medscape.com.

A teenager who weighed 300 lb and was homeschooled because he was too big to fit in a classroom chair is among the patients Manal Habib, MD, has seen in her pediatric endocrinology practice.

The boy, a social butterfly who hated isolation and blamed himself for his “poor choices,” turned out to have an MC4R mutation that interfered with proper metabolism and satiation signals.

“People often blame obese and overweight people for not having enough willpower, but it’s often a physiological problem,” said Dr. Habib, who works at the University of California, Los Angeles.

She is among the clinicians offering more aggressive forms of weight management, prescribing medications, including metformin, semaglutide, and liraglutide – often off-label – to help children and teens with obesity who do not respond to lifestyle changes.

The results of intensive interventions can be life-changing: The teen Dr. Habib treated is back at school, playing sports, and no longer needs drugs to reduce cholesterol and blood pressure. He now takes a low maintenance dose of a weight-loss medication.

But the long-term effects of these new agents on children and teens are poorly understood, and both medication and surgery are associated with significant complications. Pediatricians treating kids pre- or post-intervention should be alert to a range of physical, psychological, and behavioral risks and complications.
 

Keeping bones healthy

Pediatricians should be aware of the risk to bone health in patients who undergo surgery, according to Misra Madhusmita, MD, chief of pediatric endocrinology at Massachusetts General Hospital in Boston. In a recent study, Dr. Madhusmita and her colleagues found that sleeve gastrectomy reduced vertebral bone strength in adolescents and young adults.

“This is a time of life when bone mass is typically accruing rapidly,” Dr. Madhusmita told this news organization. “A deleterious effect on bone accrual at this time of life raises concerns about suboptimal acquisition of peak bone mass, which is typically attained in early adult life and is a key factor determining bone health and fracture risk in later life.”

Reduced skeletal loading and muscle mass can weaken bones, as can malabsorption of nutrients. Fat loss can trigger lower levels of bioavailable androgens and their subsequent conversion to estrogen, negatively affecting bone density. And sleeve gastrectomy in particular lowers ghrelin, another hormone influencing skeletal health.

Clinicians should advise patients who have had surgery to follow a healthy diet and consume sufficient levels of calcium and vitamin D, said Dr. Madhusmita. Weight-bearing exercises, weight training, and resistance training are also imperative to build bone mass and muscle. Any preexisting conditions or lifestyle factors that weaken the bones should be taken into consideration.
 

Managing expectations

The long-term effects of weight loss medications on children are less documented than with surgery, according to Caren Mangarelli, MD, a former primary care physician who is now medical director of both the adolescent bariatric program and the children’s wellness and weight management clinic at Lurie Children’s Hospital in Chicago, Ill.

But one significant known risk is the potential for rebound weight gain and the complications like high blood pressure and high blood sugar that go with it if the patient stops medication. Dr. Mangarelli said that many clinicians lack the training required to safely facilitate weight loss medications for kids.

“We have to remember that obesity is a chronic disease, especially for those with more severe forms,” she said. “They’re not likely to outgrow it. It’s not like, ‘Oh, we’ll just put a patient on medication, they’ll lose weight, and we’ll take them off of it,’ because you could create a bad cycle of losing weight, followed by metabolism slowing down, hunger cues going up, and weight going back up.”

Making the risks of stopping medication clear and supporting compliance are essential, especially when it comes to injectables like semaglutide, which can be more burdensome than taking pills, requiring weekly subcutaneous injections. Pediatricians should ensure that families understand that medication is a long-term solution, Dr. Habib said.

Many families and patients “want a quick result. They’re focused on a specific size or weight, and they want to take the medication for a short period without changing anything else,” Dr. Habib said.

But children with genetic abnormalities or severe obesity could be on medication for their entire lives. Patients who make significant healthy lifestyle changes have a greater chance of weaning off drug therapy.

But “it’s hard with children because they’re dependent on their family,” Dr. Habib said. “One of the first things that I talk about with families is that it’s very important for everyone to be involved in making healthy changes, especially the parents, because the kids are going to follow their lifestyle and choices, not necessarily what they tell them to do.”
 

The behavioral and mental

One of Dr. Habib’s most striking cases was a 6-year-old patient with autism spectrum disorder experiencing early-onset puberty. Her condition made it difficult for her parents to enforce behavioral and lifestyle changes, making medication the best option to normalize the young girl’s body.

“The goal in this case is not necessarily to help her lose weight, but to prevent her from having severe health risks at such a young age,” said Habib.

Though medication may be the best solution when other options have failed, the ease of using medication may mean clinicians fail to address the complex emotional and psychosocial factors that can both cause and result from obesity.

“A lot of families think that if just this one thing were better, everything else would fall into place,” Habib said. “But there often are multiple layers to treating the patient.”

According to Cambria Garrell, MD, a pediatrician at the UCLA Fit for Healthy Weight Program in Los Angeles, pediatricians should be aware of the psychosocial and mental health factors such as undiagnosed mental illness or family dysfunction.

Dr. Garrell sometimes cares for children with undiagnosed mental health disorders. Children with conditions like attention-deficit/hyperactivity disorder and autism spectrum disorders may struggle with eating because of impulse control and sensory processing issues. Family functioning, issues at school, and lack of sleep are also major contributors to obesity to screen for.

“We really like to think about the environmental and psychosocial factors contributing to obesity instead of just pathologizing the weight,” Dr. Garrell said.
 

Risk for alcohol abuse

Bariatric and metabolic surgeries are associated with an increased risk for alcohol use disorder (AUD). Pediatricians treating children pre- or post-op should ensure that patients receive behavioral and mental health services to minimize the risk for alcohol abuse.

The risk for AUD is likely the result of changes to the way the body metabolizes alcohol, resulting in heightened sensitivity to it, although research is not conclusive, according to Dr. Mangarelli.

The risk for AUD is likely multifactorial, Dr. Mangarelli said.

“We don’t totally understand all of it, but if you’re experiencing a high more easily, that may lead to misuse,” Dr. Mangarelli said. “It’s also important to remember that this population of patients has experienced stigma for a very long time, and they often have associated mental health and body image issues.”

“Those problems don’t disappear on their own,” she added. “You want to make sure that patients are hooked into behavioral and mental health services before surgery so that they have somebody who’s following them after surgery.”

A version of this article first appeared on Medscape.com.

A teenager who weighed 300 lb and was homeschooled because he was too big to fit in a classroom chair is among the patients Manal Habib, MD, has seen in her pediatric endocrinology practice.

The boy, a social butterfly who hated isolation and blamed himself for his “poor choices,” turned out to have an MC4R mutation that interfered with proper metabolism and satiation signals.

“People often blame obese and overweight people for not having enough willpower, but it’s often a physiological problem,” said Dr. Habib, who works at the University of California, Los Angeles.

She is among the clinicians offering more aggressive forms of weight management, prescribing medications, including metformin, semaglutide, and liraglutide – often off-label – to help children and teens with obesity who do not respond to lifestyle changes.

The results of intensive interventions can be life-changing: The teen Dr. Habib treated is back at school, playing sports, and no longer needs drugs to reduce cholesterol and blood pressure. He now takes a low maintenance dose of a weight-loss medication.

But the long-term effects of these new agents on children and teens are poorly understood, and both medication and surgery are associated with significant complications. Pediatricians treating kids pre- or post-intervention should be alert to a range of physical, psychological, and behavioral risks and complications.
 

Keeping bones healthy

Pediatricians should be aware of the risk to bone health in patients who undergo surgery, according to Misra Madhusmita, MD, chief of pediatric endocrinology at Massachusetts General Hospital in Boston. In a recent study, Dr. Madhusmita and her colleagues found that sleeve gastrectomy reduced vertebral bone strength in adolescents and young adults.

“This is a time of life when bone mass is typically accruing rapidly,” Dr. Madhusmita told this news organization. “A deleterious effect on bone accrual at this time of life raises concerns about suboptimal acquisition of peak bone mass, which is typically attained in early adult life and is a key factor determining bone health and fracture risk in later life.”

Reduced skeletal loading and muscle mass can weaken bones, as can malabsorption of nutrients. Fat loss can trigger lower levels of bioavailable androgens and their subsequent conversion to estrogen, negatively affecting bone density. And sleeve gastrectomy in particular lowers ghrelin, another hormone influencing skeletal health.

Clinicians should advise patients who have had surgery to follow a healthy diet and consume sufficient levels of calcium and vitamin D, said Dr. Madhusmita. Weight-bearing exercises, weight training, and resistance training are also imperative to build bone mass and muscle. Any preexisting conditions or lifestyle factors that weaken the bones should be taken into consideration.
 

Managing expectations

The long-term effects of weight loss medications on children are less documented than with surgery, according to Caren Mangarelli, MD, a former primary care physician who is now medical director of both the adolescent bariatric program and the children’s wellness and weight management clinic at Lurie Children’s Hospital in Chicago, Ill.

But one significant known risk is the potential for rebound weight gain and the complications like high blood pressure and high blood sugar that go with it if the patient stops medication. Dr. Mangarelli said that many clinicians lack the training required to safely facilitate weight loss medications for kids.

“We have to remember that obesity is a chronic disease, especially for those with more severe forms,” she said. “They’re not likely to outgrow it. It’s not like, ‘Oh, we’ll just put a patient on medication, they’ll lose weight, and we’ll take them off of it,’ because you could create a bad cycle of losing weight, followed by metabolism slowing down, hunger cues going up, and weight going back up.”

Making the risks of stopping medication clear and supporting compliance are essential, especially when it comes to injectables like semaglutide, which can be more burdensome than taking pills, requiring weekly subcutaneous injections. Pediatricians should ensure that families understand that medication is a long-term solution, Dr. Habib said.

Many families and patients “want a quick result. They’re focused on a specific size or weight, and they want to take the medication for a short period without changing anything else,” Dr. Habib said.

But children with genetic abnormalities or severe obesity could be on medication for their entire lives. Patients who make significant healthy lifestyle changes have a greater chance of weaning off drug therapy.

But “it’s hard with children because they’re dependent on their family,” Dr. Habib said. “One of the first things that I talk about with families is that it’s very important for everyone to be involved in making healthy changes, especially the parents, because the kids are going to follow their lifestyle and choices, not necessarily what they tell them to do.”
 

The behavioral and mental

One of Dr. Habib’s most striking cases was a 6-year-old patient with autism spectrum disorder experiencing early-onset puberty. Her condition made it difficult for her parents to enforce behavioral and lifestyle changes, making medication the best option to normalize the young girl’s body.

“The goal in this case is not necessarily to help her lose weight, but to prevent her from having severe health risks at such a young age,” said Habib.

Though medication may be the best solution when other options have failed, the ease of using medication may mean clinicians fail to address the complex emotional and psychosocial factors that can both cause and result from obesity.

“A lot of families think that if just this one thing were better, everything else would fall into place,” Habib said. “But there often are multiple layers to treating the patient.”

According to Cambria Garrell, MD, a pediatrician at the UCLA Fit for Healthy Weight Program in Los Angeles, pediatricians should be aware of the psychosocial and mental health factors such as undiagnosed mental illness or family dysfunction.

Dr. Garrell sometimes cares for children with undiagnosed mental health disorders. Children with conditions like attention-deficit/hyperactivity disorder and autism spectrum disorders may struggle with eating because of impulse control and sensory processing issues. Family functioning, issues at school, and lack of sleep are also major contributors to obesity to screen for.

“We really like to think about the environmental and psychosocial factors contributing to obesity instead of just pathologizing the weight,” Dr. Garrell said.
 

Risk for alcohol abuse

Bariatric and metabolic surgeries are associated with an increased risk for alcohol use disorder (AUD). Pediatricians treating children pre- or post-op should ensure that patients receive behavioral and mental health services to minimize the risk for alcohol abuse.

The risk for AUD is likely the result of changes to the way the body metabolizes alcohol, resulting in heightened sensitivity to it, although research is not conclusive, according to Dr. Mangarelli.

The risk for AUD is likely multifactorial, Dr. Mangarelli said.

“We don’t totally understand all of it, but if you’re experiencing a high more easily, that may lead to misuse,” Dr. Mangarelli said. “It’s also important to remember that this population of patients has experienced stigma for a very long time, and they often have associated mental health and body image issues.”

“Those problems don’t disappear on their own,” she added. “You want to make sure that patients are hooked into behavioral and mental health services before surgery so that they have somebody who’s following them after surgery.”

A version of this article first appeared on Medscape.com.

Legislators in New York City recently approved a bill specifically prohibiting weight- and height-based discrimination, on par with existing protections for gender, race, sexual orientation, and other personal identities. Other U.S. cities, as well as New York state, are considering similar moves.

Weight-based discrimination in the United States has increased by an estimated 66% over the past decade, putting it on par with the prevalence of racial discrimination. More than 40% of adult Americans and 18% of children report experiencing weight discrimination in employment, school, and/or health care settings – as well as within interpersonal relationships – demonstrating a clear need to have legal protections in place.

For obesity advocates in Canada, the news from New York triggered a moment of reflection to consider how our own advocacy efforts have fared over the years, or not. Just like in the United States, body size and obesity (and appearance in general) are not specifically protected grounds under human rights legislation in Canada (for example, the Canadian Human Rights Act), unlike race, gender, sexual orientation, and religion.

Case law is uneven across the Canadian provinces when it comes to determining whether obesity is even a disease and/or a disability. And despite broad support for anti–weight discrimination policies in Canada (Front Public Health. 2023 Apr 17;11:1060794; Milbank Q. 2015 Dec;93[4]:691-731), years of advocacy at the national and provincial levels have not led to any legislative changes (Ramos Salas Obes Rev. 2017 Nov;18[11]:1323-35; Can J Diabetes. 2015 Apr. doi: 10.1016/j.jcjd.2015.01.009). A 2017 private members bill seeking to add protection for body size to Manitoba’s human rights code was defeated, with many members of the legislature citing enforcement difficulties as the reason for voting down the proposition.

Some obesity advocates have argued that people living with obesity can be protected under the grounds of disability in the Canadian Human Rights Act. To be protected, however, individuals must demonstrate that there is actual or perceived disability relating to their weight or size; yet, many people living with obesity and those who have a higher weight don’t perceive themselves as having a disability.

In our view, the disparate viewpoints on the worthiness of considering body size a human rights issue could be resolved, at least partially, by wider understanding and adoption of the relatively new clinical definition of obesity. This definition holds that obesity is not about size; an obesity diagnosis can be made only when objective clinical investigations identify that excess or abnormal adiposity (fat tissue) impairs health.

While obesity advocates use the clinical definition of obesity, weight and body size proponents disagree that obesity is a chronic disease, and in fact believe that treating it as such can be stigmatizing. In a sense, this can sometimes be true, as not all people with larger bodies have obesity per the new definition but risk being identified as “unhealthy” in the clinical world. Bias, it turns out, can be a two-way street.

Regardless of the advocacy strategy used, it’s clear that specific anti–weight discrimination laws are needed in Canada. One in four Canadian adults report experiencing discrimination in their day-to-day life, with race, gender, age, and weight being the most commonly reported forms. To refuse to protect them against some, but not all, forms of discrimination is itself unjust, and is surely rooted in the age-old misinformed concept that excess weight is the result of laziness, poor food choices, and lack of physical activity, among other moral failings.

Including body size in human rights codes may provide a mechanism to seek legal remedy from discriminatory acts, but it will do little to address rampant weight bias, in the same way that race-based legal protections don’t eradicate racism. And it’s not just the legal community that fails to understand that weight is, by and large, a product of our environment and our genes. Weight bias and stigma are well documented in media, workplaces, the home, and in health care systems.

The solution, in our minds, is meaningful education across all these domains, reinforcing that weight is not a behavior, just as health is not a size. If we truly understand and embrace these concepts, then as a society we may someday recognize that body size is not a choice, just like race, sexual orientation, gender identity, and other individual characteristics. And if it’s not a choice, if it’s not a behavior, then it deserves the same protections.

At the same time, people with obesity deserve to seek evidence-based treatment, just as those at higher weights who experience no weight or adiposity-related health issues deserve not to be identified as having a disease simply because of their size.

If we all follow the science, we might yet turn a common understanding into more equitable outcomes for all.

Dr. Ramos Salas and Mr. Hussey are research consultants for Replica Communications, Hamilton, Ont. She disclosed ties with the Canadian Institutes of Health Research, European Association for the Study of Obesity, Novo Nordisk, Obesity Canada, The Obesity Society, World Obesity, and the World Health Organization. Mr. Hussey disclosed ties with the European Association for the Study of Obesity, Novo Nordisk, Obesity Canada, and the World Health Organization (Nutrition and Food Safety).

A version of this article originally appeared on Medscape.com.

Legislators in New York City recently approved a bill specifically prohibiting weight- and height-based discrimination, on par with existing protections for gender, race, sexual orientation, and other personal identities. Other U.S. cities, as well as New York state, are considering similar moves.

Weight-based discrimination in the United States has increased by an estimated 66% over the past decade, putting it on par with the prevalence of racial discrimination. More than 40% of adult Americans and 18% of children report experiencing weight discrimination in employment, school, and/or health care settings – as well as within interpersonal relationships – demonstrating a clear need to have legal protections in place.

For obesity advocates in Canada, the news from New York triggered a moment of reflection to consider how our own advocacy efforts have fared over the years, or not. Just like in the United States, body size and obesity (and appearance in general) are not specifically protected grounds under human rights legislation in Canada (for example, the Canadian Human Rights Act), unlike race, gender, sexual orientation, and religion.

Case law is uneven across the Canadian provinces when it comes to determining whether obesity is even a disease and/or a disability. And despite broad support for anti–weight discrimination policies in Canada (Front Public Health. 2023 Apr 17;11:1060794; Milbank Q. 2015 Dec;93[4]:691-731), years of advocacy at the national and provincial levels have not led to any legislative changes (Ramos Salas Obes Rev. 2017 Nov;18[11]:1323-35; Can J Diabetes. 2015 Apr. doi: 10.1016/j.jcjd.2015.01.009). A 2017 private members bill seeking to add protection for body size to Manitoba’s human rights code was defeated, with many members of the legislature citing enforcement difficulties as the reason for voting down the proposition.

Some obesity advocates have argued that people living with obesity can be protected under the grounds of disability in the Canadian Human Rights Act. To be protected, however, individuals must demonstrate that there is actual or perceived disability relating to their weight or size; yet, many people living with obesity and those who have a higher weight don’t perceive themselves as having a disability.

In our view, the disparate viewpoints on the worthiness of considering body size a human rights issue could be resolved, at least partially, by wider understanding and adoption of the relatively new clinical definition of obesity. This definition holds that obesity is not about size; an obesity diagnosis can be made only when objective clinical investigations identify that excess or abnormal adiposity (fat tissue) impairs health.

While obesity advocates use the clinical definition of obesity, weight and body size proponents disagree that obesity is a chronic disease, and in fact believe that treating it as such can be stigmatizing. In a sense, this can sometimes be true, as not all people with larger bodies have obesity per the new definition but risk being identified as “unhealthy” in the clinical world. Bias, it turns out, can be a two-way street.

Regardless of the advocacy strategy used, it’s clear that specific anti–weight discrimination laws are needed in Canada. One in four Canadian adults report experiencing discrimination in their day-to-day life, with race, gender, age, and weight being the most commonly reported forms. To refuse to protect them against some, but not all, forms of discrimination is itself unjust, and is surely rooted in the age-old misinformed concept that excess weight is the result of laziness, poor food choices, and lack of physical activity, among other moral failings.

Including body size in human rights codes may provide a mechanism to seek legal remedy from discriminatory acts, but it will do little to address rampant weight bias, in the same way that race-based legal protections don’t eradicate racism. And it’s not just the legal community that fails to understand that weight is, by and large, a product of our environment and our genes. Weight bias and stigma are well documented in media, workplaces, the home, and in health care systems.

The solution, in our minds, is meaningful education across all these domains, reinforcing that weight is not a behavior, just as health is not a size. If we truly understand and embrace these concepts, then as a society we may someday recognize that body size is not a choice, just like race, sexual orientation, gender identity, and other individual characteristics. And if it’s not a choice, if it’s not a behavior, then it deserves the same protections.

At the same time, people with obesity deserve to seek evidence-based treatment, just as those at higher weights who experience no weight or adiposity-related health issues deserve not to be identified as having a disease simply because of their size.

If we all follow the science, we might yet turn a common understanding into more equitable outcomes for all.

Dr. Ramos Salas and Mr. Hussey are research consultants for Replica Communications, Hamilton, Ont. She disclosed ties with the Canadian Institutes of Health Research, European Association for the Study of Obesity, Novo Nordisk, Obesity Canada, The Obesity Society, World Obesity, and the World Health Organization. Mr. Hussey disclosed ties with the European Association for the Study of Obesity, Novo Nordisk, Obesity Canada, and the World Health Organization (Nutrition and Food Safety).

A version of this article originally appeared on Medscape.com.

Legislators in New York City recently approved a bill specifically prohibiting weight- and height-based discrimination, on par with existing protections for gender, race, sexual orientation, and other personal identities. Other U.S. cities, as well as New York state, are considering similar moves.

Weight-based discrimination in the United States has increased by an estimated 66% over the past decade, putting it on par with the prevalence of racial discrimination. More than 40% of adult Americans and 18% of children report experiencing weight discrimination in employment, school, and/or health care settings – as well as within interpersonal relationships – demonstrating a clear need to have legal protections in place.

For obesity advocates in Canada, the news from New York triggered a moment of reflection to consider how our own advocacy efforts have fared over the years, or not. Just like in the United States, body size and obesity (and appearance in general) are not specifically protected grounds under human rights legislation in Canada (for example, the Canadian Human Rights Act), unlike race, gender, sexual orientation, and religion.

Case law is uneven across the Canadian provinces when it comes to determining whether obesity is even a disease and/or a disability. And despite broad support for anti–weight discrimination policies in Canada (Front Public Health. 2023 Apr 17;11:1060794; Milbank Q. 2015 Dec;93[4]:691-731), years of advocacy at the national and provincial levels have not led to any legislative changes (Ramos Salas Obes Rev. 2017 Nov;18[11]:1323-35; Can J Diabetes. 2015 Apr. doi: 10.1016/j.jcjd.2015.01.009). A 2017 private members bill seeking to add protection for body size to Manitoba’s human rights code was defeated, with many members of the legislature citing enforcement difficulties as the reason for voting down the proposition.

Some obesity advocates have argued that people living with obesity can be protected under the grounds of disability in the Canadian Human Rights Act. To be protected, however, individuals must demonstrate that there is actual or perceived disability relating to their weight or size; yet, many people living with obesity and those who have a higher weight don’t perceive themselves as having a disability.

In our view, the disparate viewpoints on the worthiness of considering body size a human rights issue could be resolved, at least partially, by wider understanding and adoption of the relatively new clinical definition of obesity. This definition holds that obesity is not about size; an obesity diagnosis can be made only when objective clinical investigations identify that excess or abnormal adiposity (fat tissue) impairs health.

While obesity advocates use the clinical definition of obesity, weight and body size proponents disagree that obesity is a chronic disease, and in fact believe that treating it as such can be stigmatizing. In a sense, this can sometimes be true, as not all people with larger bodies have obesity per the new definition but risk being identified as “unhealthy” in the clinical world. Bias, it turns out, can be a two-way street.

Regardless of the advocacy strategy used, it’s clear that specific anti–weight discrimination laws are needed in Canada. One in four Canadian adults report experiencing discrimination in their day-to-day life, with race, gender, age, and weight being the most commonly reported forms. To refuse to protect them against some, but not all, forms of discrimination is itself unjust, and is surely rooted in the age-old misinformed concept that excess weight is the result of laziness, poor food choices, and lack of physical activity, among other moral failings.

Including body size in human rights codes may provide a mechanism to seek legal remedy from discriminatory acts, but it will do little to address rampant weight bias, in the same way that race-based legal protections don’t eradicate racism. And it’s not just the legal community that fails to understand that weight is, by and large, a product of our environment and our genes. Weight bias and stigma are well documented in media, workplaces, the home, and in health care systems.

The solution, in our minds, is meaningful education across all these domains, reinforcing that weight is not a behavior, just as health is not a size. If we truly understand and embrace these concepts, then as a society we may someday recognize that body size is not a choice, just like race, sexual orientation, gender identity, and other individual characteristics. And if it’s not a choice, if it’s not a behavior, then it deserves the same protections.

At the same time, people with obesity deserve to seek evidence-based treatment, just as those at higher weights who experience no weight or adiposity-related health issues deserve not to be identified as having a disease simply because of their size.

If we all follow the science, we might yet turn a common understanding into more equitable outcomes for all.

Dr. Ramos Salas and Mr. Hussey are research consultants for Replica Communications, Hamilton, Ont. She disclosed ties with the Canadian Institutes of Health Research, European Association for the Study of Obesity, Novo Nordisk, Obesity Canada, The Obesity Society, World Obesity, and the World Health Organization. Mr. Hussey disclosed ties with the European Association for the Study of Obesity, Novo Nordisk, Obesity Canada, and the World Health Organization (Nutrition and Food Safety).

A version of this article originally appeared on Medscape.com.

This is the second in a three-part series on the obesity crisis. Part one tackles a complicated question – why does the obesity rate keep rising despite our efforts to stop it? – and can be found here. Part three shows how doctors and patients can make treatment better and can be found here. 

In the mid-1980s, Louis J. Aronne, MD, strolled into a lab at Rockefeller University in New York where a colleague was breeding mice. “I will never forget what he showed me,” said Dr. Aronne, now the director of obesity research and treatment at Weill Cornell Medicine in New York. “He had a cage with 10 mice, one severely obese and the others normal weight. He took blood from one of the thin mice and gave it to the fat mouse.”
 

When Dr. Aronne returned 3 days later, that obese mouse had turned thin. 

It was proof of something Dr. Aronne already suspected: Obesity had biological causes and wasn’t just a failure of willpower.

Years later, in 1994, that research led to the discovery of leptin, a hormone released from fat cells that’s involved in the regulation of body weight. It was a watershed moment in obesity research. 

Since then, Dr. Aronne and others have worked to build the clinical field of obesity medicine, attempting to shift the public and medical view of obesity from a purely behavioral issue to a disease worthy of medical treatment. 

All the while, the U.S. obesity rate soared. 

Now, another watershed moment: We finally have highly effective obesity drugs. The hype is real, and so are the weight loss results. 

“I’ve been saying for 30 years that when we find treatments that really work, people aren’t going to believe the results,” Dr. Aronne said. “It took longer than I expected, but it’s gratifying now to see.”

All this excitement raises a crucial question: Will the new drugs finally end the obesity crisis? Experts have their doubts.
 

The big question

The emerging class of obesity medications known as GLP-1 agonists is indeed a game changer. The weight loss drug semaglutide (Ozempic, Wegovy) showed groundbreaking results, and studies suggest a parade of even more impressive drugs is on the way.

Yes, the drugs offer new hope to millions with obesity complications. But to truly turn the tide on our 42% obesity rate, much more work remains to be done, researchers said, including answering a big question:

How do these weight loss drugs work? 

“We have new blockbuster drugs, and we don’t even know why they reduce body weight,” said Samuel Klein, MD, professor of medicine and nutritional science at Washington University in St. Louis. “It was by accident that this was discovered.”
 

Oops, we created a weight loss drug

Developed to treat diabetes, the GLP-1 drugs’ weight loss effects were a surprise. Now that those effects are confirmed, pharmaceutical companies and researchers are racing to figure out how these drugs work. 

In the 1960s, scientists discovered the incretin effect – when you eat glucose (sugar), your body makes more insulin than it does if glucose is given intravenously. Glucose passes through the GI tract and the gut releases hormones that stimulate insulin secretion. It’s “essentially a feed-forward signal to your pancreas to tell it, ‘By the way, you need to be ready because there’s a bunch of glucose coming,’ ” said Randy Seeley, MD, director of the Michigan Nutrition Obesity Research Center, funded by the National Institutes of Health. 

One of these hormones – or “incretins” – is GLP-1. In experiments, people with type 2 diabetes who were hooked up to GLP-1 saw their blood sugar go down. 

“That led to the idea that if we could take this native hormone and make it last longer, we’d have a therapy for type 2 diabetes,” said Dr. Seeley. Thanks to a GLP-1-like compound in the saliva of the Gila monster, that idea became reality in the 2000s. 

Along the way, a surprising side finding came to light: In early trials, diabetes patients on these drugs dropped weight. 

Both Ozempic and Wegovy – brand names for semaglutide – are once-weekly injections (pill forms to treat obesity are on the way), but the latter is a higher dose. 

“That dose results in about 40% of patients in the clinical trials achieving a 20% weight loss. We’ve just had nothing like that in terms of efficacy before,” said Dr. Seeley, who has worked with some of the drug companies (including Novo Nordisk, the maker of Ozempic and Wegovy, and Eli Lilly, maker of Mounjaro) that market the GLP-1s. 

By contrast, semaglutide’s once-a-day predecessor liraglutide (Saxenda, made by Novo Nordisk) can lead to about 10% weight loss. 

“And one of the ironies is, we don’t really know why,” Dr. Seeley said. “We don’t know why semaglutide is a better molecule for weight loss than liraglutide.” 

Initially, scientists believed that the drugs, in addition to telling the pancreas to secrete more insulin, were also signaling the brain that you’re full. “Turns out that’s not really the way it works,” Dr. Seeley said. “GLP-1 made from your gut probably doesn’t get into your brain very much. But you make GLP-1 in your brain as well.”

For weight loss, it’s the brain’s GLP-1 system, not the gut’s, that the drugs are thought to hijack. But exactly which parts of the brain they affect and how is unknown. “That’s something lots of people are working on, including our own lab,” Dr. Seeley said. (Another surprise: The drugs may have potential as an anti-addiction treatment.)

The diabetes medication tirzepatide (Mounjaro), expected to be approved for weight loss as early as this year, is also a weekly injection, but it has a unique feature: It starts a response not just for GLP-1 but also for another incretin called GIP. Turns out, two is better than one: Trial participants on tirzepatide lost up to 22.5% of their body weight. 

More of these hybrid drugs are on the way, Dr. Seeley said. In mid-stage clinical trials, the drug retatrutide, which targets three hormones, led to 24% weight loss. “The idea is the more bullets we can load into the gun, the more we can push the biology into a place where it’s easier to lose weight.”
 

Shifting from prevention to damage control

Less invasive and more scalable than surgery (only 1% of the eligible population gets bariatric surgery), the drugs offer doctors a safe, effective way to treat many patients with obesity. That’s cause for excitement, but concerns remain because they are expensive, costing about $800 to $1,300 per month out of pocket. Many health insurers, including Medicare, do not cover them for weight loss. 

“You have this significant advance in obesity treatment, but very few will be able to access it,” said Gary Foster, PhD, adjunct professor of psychology in psychiatry at the University of Pennsylvania, Philadelphia, and chief scientific officer at WW (formerly Weight Watchers).

There is a push, including a proposed bill, to get Medicare to cover obesity medication. But given the expense of the drugs, the health economics do not support that move, according to an editorial in the New England Journal of Medicine. If Medicare were to cover obesity meds, the budget impact would likely be huge, potentially driving up premiums. If other payers followed suit, the impact could be felt across the U.S. health care system. 

Other drawbacks include side effects – including nausea, diarrhea, stomach pain, and vomiting – that can be so bad that some patients can’t tolerate them.

And critically, the drugs do not deal with the root cause of the problem, said Robert Lustig, MD, an endocrinologist and pediatrician at the University of California, San Francisco, who has suggested that excess insulin is driving obesity. “No one has the disease that these drugs are treating. No one has GLP-1 deficiency. They’re bypassing the problem. They’re band-aiding the problem.” 

Because the drugs work by mimicking starvation – they appear to curb hunger, so you eat less – people on them lose not just fat but also healthy lean mass, Dr. Lustig said. 

Concerns about pancreatitis did not really bear out in postmarketing reports. (The drugs are still not recommended in people with pancreatitis or multiple endocrine neoplasia.) But predicting longer-term outcomes can be difficult, noted Dr. Lustig.

Then there are philosophical questions, said James Hill, PhD, director of the Nutrition Obesity Research Center at the University of Alabama at Birmingham.. “If you’re continuing to not exercise and eat not healthy foods and take a medication, is that success? Have we won when people are at a lower weight but not doing a healthy behavior?”

‘We can’t treat our way out of this’

The fact is, ending the obesity epidemic is a tall order, even for drugs as impressive as these. 

“We can’t treat our way out of this,” said Jamy Ard, MD, codirector of Wake Forest Baptist Health Weight Management Center in Winston-Salem, N.C. “The treatments we have now are great, and there will be more coming. But we do need to figure out the prevention side of things.” 

Dr. Seeley agreed but added that we can’t diet-and-exercise our way out either. 

“There’s no switch to be flipped,” Dr. Seeley said. “If you told me we shouldn’t spend all this money on these drugs, we should spend it on prevention – great! What would we do?” 

And prevention efforts won’t help the millions already living with health problems from obesity, Dr. Aronne said. 

“Getting people to stop smoking prevents lung cancer. But stopping smoking doesn’t treat lung cancer,” Dr. Aronne said. “Once the physical changes occur in the lung that cause a tumor to grow, it’s too late. You have to think of obesity the same way.” 

Dr. Seeley pointed out that “fearmongering” around the drugs highlights our lingering bias that obesity is a lifestyle issue that should not be medically treated. 

“People say, ‘When you stop taking it, you’re going to gain the weight back,’ ” Dr. Seeley said. “There’s truth to that, but when you stop taking your hypertension medication, your blood pressure goes up. We don’t think of that as a [reason] for why you shouldn’t take your blood pressure medication. But that gets trumpeted into all these conversations about whether people [with obesity] should be treated at all.”

Like obesity, blood pressure was once thought to be a behavioral problem, Dr. Aronne said. But blood pressure meds prevent heart attacks and strokes. And it’s likely obesity meds will do the same. 

One 55-year-old patient on the road to kidney failure lost weight on obesity medications, including semaglutide, Dr. Aronne said. Now, 6 years later, his kidney function is back to normal. “Normally, we think of kidney disease as irreversible,” Dr. Aronne said. 

In that respect, these drugs should save money in the long run by virtue of heading off those health care costs, said Dr. Seeley, who imagines a future where obesity is not gone but better managed, like high blood pressure is now. 

In the end, the drugs are another step toward what Dr. Aronne and many others have always pushed for: Treating obesity as a disease. 
 

A version of this article originally appeared on WebMD.com.

This is the second in a three-part series on the obesity crisis. Part one tackles a complicated question – why does the obesity rate keep rising despite our efforts to stop it? – and can be found here. Part three shows how doctors and patients can make treatment better and can be found here. 

In the mid-1980s, Louis J. Aronne, MD, strolled into a lab at Rockefeller University in New York where a colleague was breeding mice. “I will never forget what he showed me,” said Dr. Aronne, now the director of obesity research and treatment at Weill Cornell Medicine in New York. “He had a cage with 10 mice, one severely obese and the others normal weight. He took blood from one of the thin mice and gave it to the fat mouse.”
 

When Dr. Aronne returned 3 days later, that obese mouse had turned thin. 

It was proof of something Dr. Aronne already suspected: Obesity had biological causes and wasn’t just a failure of willpower.

Years later, in 1994, that research led to the discovery of leptin, a hormone released from fat cells that’s involved in the regulation of body weight. It was a watershed moment in obesity research. 

Since then, Dr. Aronne and others have worked to build the clinical field of obesity medicine, attempting to shift the public and medical view of obesity from a purely behavioral issue to a disease worthy of medical treatment. 

All the while, the U.S. obesity rate soared. 

Now, another watershed moment: We finally have highly effective obesity drugs. The hype is real, and so are the weight loss results. 

“I’ve been saying for 30 years that when we find treatments that really work, people aren’t going to believe the results,” Dr. Aronne said. “It took longer than I expected, but it’s gratifying now to see.”

All this excitement raises a crucial question: Will the new drugs finally end the obesity crisis? Experts have their doubts.
 

The big question

The emerging class of obesity medications known as GLP-1 agonists is indeed a game changer. The weight loss drug semaglutide (Ozempic, Wegovy) showed groundbreaking results, and studies suggest a parade of even more impressive drugs is on the way.

Yes, the drugs offer new hope to millions with obesity complications. But to truly turn the tide on our 42% obesity rate, much more work remains to be done, researchers said, including answering a big question:

How do these weight loss drugs work? 

“We have new blockbuster drugs, and we don’t even know why they reduce body weight,” said Samuel Klein, MD, professor of medicine and nutritional science at Washington University in St. Louis. “It was by accident that this was discovered.”
 

Oops, we created a weight loss drug

Developed to treat diabetes, the GLP-1 drugs’ weight loss effects were a surprise. Now that those effects are confirmed, pharmaceutical companies and researchers are racing to figure out how these drugs work. 

In the 1960s, scientists discovered the incretin effect – when you eat glucose (sugar), your body makes more insulin than it does if glucose is given intravenously. Glucose passes through the GI tract and the gut releases hormones that stimulate insulin secretion. It’s “essentially a feed-forward signal to your pancreas to tell it, ‘By the way, you need to be ready because there’s a bunch of glucose coming,’ ” said Randy Seeley, MD, director of the Michigan Nutrition Obesity Research Center, funded by the National Institutes of Health. 

One of these hormones – or “incretins” – is GLP-1. In experiments, people with type 2 diabetes who were hooked up to GLP-1 saw their blood sugar go down. 

“That led to the idea that if we could take this native hormone and make it last longer, we’d have a therapy for type 2 diabetes,” said Dr. Seeley. Thanks to a GLP-1-like compound in the saliva of the Gila monster, that idea became reality in the 2000s. 

Along the way, a surprising side finding came to light: In early trials, diabetes patients on these drugs dropped weight. 

Both Ozempic and Wegovy – brand names for semaglutide – are once-weekly injections (pill forms to treat obesity are on the way), but the latter is a higher dose. 

“That dose results in about 40% of patients in the clinical trials achieving a 20% weight loss. We’ve just had nothing like that in terms of efficacy before,” said Dr. Seeley, who has worked with some of the drug companies (including Novo Nordisk, the maker of Ozempic and Wegovy, and Eli Lilly, maker of Mounjaro) that market the GLP-1s. 

By contrast, semaglutide’s once-a-day predecessor liraglutide (Saxenda, made by Novo Nordisk) can lead to about 10% weight loss. 

“And one of the ironies is, we don’t really know why,” Dr. Seeley said. “We don’t know why semaglutide is a better molecule for weight loss than liraglutide.” 

Initially, scientists believed that the drugs, in addition to telling the pancreas to secrete more insulin, were also signaling the brain that you’re full. “Turns out that’s not really the way it works,” Dr. Seeley said. “GLP-1 made from your gut probably doesn’t get into your brain very much. But you make GLP-1 in your brain as well.”

For weight loss, it’s the brain’s GLP-1 system, not the gut’s, that the drugs are thought to hijack. But exactly which parts of the brain they affect and how is unknown. “That’s something lots of people are working on, including our own lab,” Dr. Seeley said. (Another surprise: The drugs may have potential as an anti-addiction treatment.)

The diabetes medication tirzepatide (Mounjaro), expected to be approved for weight loss as early as this year, is also a weekly injection, but it has a unique feature: It starts a response not just for GLP-1 but also for another incretin called GIP. Turns out, two is better than one: Trial participants on tirzepatide lost up to 22.5% of their body weight. 

More of these hybrid drugs are on the way, Dr. Seeley said. In mid-stage clinical trials, the drug retatrutide, which targets three hormones, led to 24% weight loss. “The idea is the more bullets we can load into the gun, the more we can push the biology into a place where it’s easier to lose weight.”
 

Shifting from prevention to damage control

Less invasive and more scalable than surgery (only 1% of the eligible population gets bariatric surgery), the drugs offer doctors a safe, effective way to treat many patients with obesity. That’s cause for excitement, but concerns remain because they are expensive, costing about $800 to $1,300 per month out of pocket. Many health insurers, including Medicare, do not cover them for weight loss. 

“You have this significant advance in obesity treatment, but very few will be able to access it,” said Gary Foster, PhD, adjunct professor of psychology in psychiatry at the University of Pennsylvania, Philadelphia, and chief scientific officer at WW (formerly Weight Watchers).

There is a push, including a proposed bill, to get Medicare to cover obesity medication. But given the expense of the drugs, the health economics do not support that move, according to an editorial in the New England Journal of Medicine. If Medicare were to cover obesity meds, the budget impact would likely be huge, potentially driving up premiums. If other payers followed suit, the impact could be felt across the U.S. health care system. 

Other drawbacks include side effects – including nausea, diarrhea, stomach pain, and vomiting – that can be so bad that some patients can’t tolerate them.

And critically, the drugs do not deal with the root cause of the problem, said Robert Lustig, MD, an endocrinologist and pediatrician at the University of California, San Francisco, who has suggested that excess insulin is driving obesity. “No one has the disease that these drugs are treating. No one has GLP-1 deficiency. They’re bypassing the problem. They’re band-aiding the problem.” 

Because the drugs work by mimicking starvation – they appear to curb hunger, so you eat less – people on them lose not just fat but also healthy lean mass, Dr. Lustig said. 

Concerns about pancreatitis did not really bear out in postmarketing reports. (The drugs are still not recommended in people with pancreatitis or multiple endocrine neoplasia.) But predicting longer-term outcomes can be difficult, noted Dr. Lustig.

Then there are philosophical questions, said James Hill, PhD, director of the Nutrition Obesity Research Center at the University of Alabama at Birmingham.. “If you’re continuing to not exercise and eat not healthy foods and take a medication, is that success? Have we won when people are at a lower weight but not doing a healthy behavior?”

‘We can’t treat our way out of this’

The fact is, ending the obesity epidemic is a tall order, even for drugs as impressive as these. 

“We can’t treat our way out of this,” said Jamy Ard, MD, codirector of Wake Forest Baptist Health Weight Management Center in Winston-Salem, N.C. “The treatments we have now are great, and there will be more coming. But we do need to figure out the prevention side of things.” 

Dr. Seeley agreed but added that we can’t diet-and-exercise our way out either. 

“There’s no switch to be flipped,” Dr. Seeley said. “If you told me we shouldn’t spend all this money on these drugs, we should spend it on prevention – great! What would we do?” 

And prevention efforts won’t help the millions already living with health problems from obesity, Dr. Aronne said. 

“Getting people to stop smoking prevents lung cancer. But stopping smoking doesn’t treat lung cancer,” Dr. Aronne said. “Once the physical changes occur in the lung that cause a tumor to grow, it’s too late. You have to think of obesity the same way.” 

Dr. Seeley pointed out that “fearmongering” around the drugs highlights our lingering bias that obesity is a lifestyle issue that should not be medically treated. 

“People say, ‘When you stop taking it, you’re going to gain the weight back,’ ” Dr. Seeley said. “There’s truth to that, but when you stop taking your hypertension medication, your blood pressure goes up. We don’t think of that as a [reason] for why you shouldn’t take your blood pressure medication. But that gets trumpeted into all these conversations about whether people [with obesity] should be treated at all.”

Like obesity, blood pressure was once thought to be a behavioral problem, Dr. Aronne said. But blood pressure meds prevent heart attacks and strokes. And it’s likely obesity meds will do the same. 

One 55-year-old patient on the road to kidney failure lost weight on obesity medications, including semaglutide, Dr. Aronne said. Now, 6 years later, his kidney function is back to normal. “Normally, we think of kidney disease as irreversible,” Dr. Aronne said. 

In that respect, these drugs should save money in the long run by virtue of heading off those health care costs, said Dr. Seeley, who imagines a future where obesity is not gone but better managed, like high blood pressure is now. 

In the end, the drugs are another step toward what Dr. Aronne and many others have always pushed for: Treating obesity as a disease. 
 

A version of this article originally appeared on WebMD.com.

This is the second in a three-part series on the obesity crisis. Part one tackles a complicated question – why does the obesity rate keep rising despite our efforts to stop it? – and can be found here. Part three shows how doctors and patients can make treatment better and can be found here. 

In the mid-1980s, Louis J. Aronne, MD, strolled into a lab at Rockefeller University in New York where a colleague was breeding mice. “I will never forget what he showed me,” said Dr. Aronne, now the director of obesity research and treatment at Weill Cornell Medicine in New York. “He had a cage with 10 mice, one severely obese and the others normal weight. He took blood from one of the thin mice and gave it to the fat mouse.”
 

When Dr. Aronne returned 3 days later, that obese mouse had turned thin. 

It was proof of something Dr. Aronne already suspected: Obesity had biological causes and wasn’t just a failure of willpower.

Years later, in 1994, that research led to the discovery of leptin, a hormone released from fat cells that’s involved in the regulation of body weight. It was a watershed moment in obesity research. 

Since then, Dr. Aronne and others have worked to build the clinical field of obesity medicine, attempting to shift the public and medical view of obesity from a purely behavioral issue to a disease worthy of medical treatment. 

All the while, the U.S. obesity rate soared. 

Now, another watershed moment: We finally have highly effective obesity drugs. The hype is real, and so are the weight loss results. 

“I’ve been saying for 30 years that when we find treatments that really work, people aren’t going to believe the results,” Dr. Aronne said. “It took longer than I expected, but it’s gratifying now to see.”

All this excitement raises a crucial question: Will the new drugs finally end the obesity crisis? Experts have their doubts.
 

The big question

The emerging class of obesity medications known as GLP-1 agonists is indeed a game changer. The weight loss drug semaglutide (Ozempic, Wegovy) showed groundbreaking results, and studies suggest a parade of even more impressive drugs is on the way.

Yes, the drugs offer new hope to millions with obesity complications. But to truly turn the tide on our 42% obesity rate, much more work remains to be done, researchers said, including answering a big question:

How do these weight loss drugs work? 

“We have new blockbuster drugs, and we don’t even know why they reduce body weight,” said Samuel Klein, MD, professor of medicine and nutritional science at Washington University in St. Louis. “It was by accident that this was discovered.”
 

Oops, we created a weight loss drug

Developed to treat diabetes, the GLP-1 drugs’ weight loss effects were a surprise. Now that those effects are confirmed, pharmaceutical companies and researchers are racing to figure out how these drugs work. 

In the 1960s, scientists discovered the incretin effect – when you eat glucose (sugar), your body makes more insulin than it does if glucose is given intravenously. Glucose passes through the GI tract and the gut releases hormones that stimulate insulin secretion. It’s “essentially a feed-forward signal to your pancreas to tell it, ‘By the way, you need to be ready because there’s a bunch of glucose coming,’ ” said Randy Seeley, MD, director of the Michigan Nutrition Obesity Research Center, funded by the National Institutes of Health. 

One of these hormones – or “incretins” – is GLP-1. In experiments, people with type 2 diabetes who were hooked up to GLP-1 saw their blood sugar go down. 

“That led to the idea that if we could take this native hormone and make it last longer, we’d have a therapy for type 2 diabetes,” said Dr. Seeley. Thanks to a GLP-1-like compound in the saliva of the Gila monster, that idea became reality in the 2000s. 

Along the way, a surprising side finding came to light: In early trials, diabetes patients on these drugs dropped weight. 

Both Ozempic and Wegovy – brand names for semaglutide – are once-weekly injections (pill forms to treat obesity are on the way), but the latter is a higher dose. 

“That dose results in about 40% of patients in the clinical trials achieving a 20% weight loss. We’ve just had nothing like that in terms of efficacy before,” said Dr. Seeley, who has worked with some of the drug companies (including Novo Nordisk, the maker of Ozempic and Wegovy, and Eli Lilly, maker of Mounjaro) that market the GLP-1s. 

By contrast, semaglutide’s once-a-day predecessor liraglutide (Saxenda, made by Novo Nordisk) can lead to about 10% weight loss. 

“And one of the ironies is, we don’t really know why,” Dr. Seeley said. “We don’t know why semaglutide is a better molecule for weight loss than liraglutide.” 

Initially, scientists believed that the drugs, in addition to telling the pancreas to secrete more insulin, were also signaling the brain that you’re full. “Turns out that’s not really the way it works,” Dr. Seeley said. “GLP-1 made from your gut probably doesn’t get into your brain very much. But you make GLP-1 in your brain as well.”

For weight loss, it’s the brain’s GLP-1 system, not the gut’s, that the drugs are thought to hijack. But exactly which parts of the brain they affect and how is unknown. “That’s something lots of people are working on, including our own lab,” Dr. Seeley said. (Another surprise: The drugs may have potential as an anti-addiction treatment.)

The diabetes medication tirzepatide (Mounjaro), expected to be approved for weight loss as early as this year, is also a weekly injection, but it has a unique feature: It starts a response not just for GLP-1 but also for another incretin called GIP. Turns out, two is better than one: Trial participants on tirzepatide lost up to 22.5% of their body weight. 

More of these hybrid drugs are on the way, Dr. Seeley said. In mid-stage clinical trials, the drug retatrutide, which targets three hormones, led to 24% weight loss. “The idea is the more bullets we can load into the gun, the more we can push the biology into a place where it’s easier to lose weight.”
 

Shifting from prevention to damage control

Less invasive and more scalable than surgery (only 1% of the eligible population gets bariatric surgery), the drugs offer doctors a safe, effective way to treat many patients with obesity. That’s cause for excitement, but concerns remain because they are expensive, costing about $800 to $1,300 per month out of pocket. Many health insurers, including Medicare, do not cover them for weight loss. 

“You have this significant advance in obesity treatment, but very few will be able to access it,” said Gary Foster, PhD, adjunct professor of psychology in psychiatry at the University of Pennsylvania, Philadelphia, and chief scientific officer at WW (formerly Weight Watchers).

There is a push, including a proposed bill, to get Medicare to cover obesity medication. But given the expense of the drugs, the health economics do not support that move, according to an editorial in the New England Journal of Medicine. If Medicare were to cover obesity meds, the budget impact would likely be huge, potentially driving up premiums. If other payers followed suit, the impact could be felt across the U.S. health care system. 

Other drawbacks include side effects – including nausea, diarrhea, stomach pain, and vomiting – that can be so bad that some patients can’t tolerate them.

And critically, the drugs do not deal with the root cause of the problem, said Robert Lustig, MD, an endocrinologist and pediatrician at the University of California, San Francisco, who has suggested that excess insulin is driving obesity. “No one has the disease that these drugs are treating. No one has GLP-1 deficiency. They’re bypassing the problem. They’re band-aiding the problem.” 

Because the drugs work by mimicking starvation – they appear to curb hunger, so you eat less – people on them lose not just fat but also healthy lean mass, Dr. Lustig said. 

Concerns about pancreatitis did not really bear out in postmarketing reports. (The drugs are still not recommended in people with pancreatitis or multiple endocrine neoplasia.) But predicting longer-term outcomes can be difficult, noted Dr. Lustig.

Then there are philosophical questions, said James Hill, PhD, director of the Nutrition Obesity Research Center at the University of Alabama at Birmingham.. “If you’re continuing to not exercise and eat not healthy foods and take a medication, is that success? Have we won when people are at a lower weight but not doing a healthy behavior?”

‘We can’t treat our way out of this’

The fact is, ending the obesity epidemic is a tall order, even for drugs as impressive as these. 

“We can’t treat our way out of this,” said Jamy Ard, MD, codirector of Wake Forest Baptist Health Weight Management Center in Winston-Salem, N.C. “The treatments we have now are great, and there will be more coming. But we do need to figure out the prevention side of things.” 

Dr. Seeley agreed but added that we can’t diet-and-exercise our way out either. 

“There’s no switch to be flipped,” Dr. Seeley said. “If you told me we shouldn’t spend all this money on these drugs, we should spend it on prevention – great! What would we do?” 

And prevention efforts won’t help the millions already living with health problems from obesity, Dr. Aronne said. 

“Getting people to stop smoking prevents lung cancer. But stopping smoking doesn’t treat lung cancer,” Dr. Aronne said. “Once the physical changes occur in the lung that cause a tumor to grow, it’s too late. You have to think of obesity the same way.” 

Dr. Seeley pointed out that “fearmongering” around the drugs highlights our lingering bias that obesity is a lifestyle issue that should not be medically treated. 

“People say, ‘When you stop taking it, you’re going to gain the weight back,’ ” Dr. Seeley said. “There’s truth to that, but when you stop taking your hypertension medication, your blood pressure goes up. We don’t think of that as a [reason] for why you shouldn’t take your blood pressure medication. But that gets trumpeted into all these conversations about whether people [with obesity] should be treated at all.”

Like obesity, blood pressure was once thought to be a behavioral problem, Dr. Aronne said. But blood pressure meds prevent heart attacks and strokes. And it’s likely obesity meds will do the same. 

One 55-year-old patient on the road to kidney failure lost weight on obesity medications, including semaglutide, Dr. Aronne said. Now, 6 years later, his kidney function is back to normal. “Normally, we think of kidney disease as irreversible,” Dr. Aronne said. 

In that respect, these drugs should save money in the long run by virtue of heading off those health care costs, said Dr. Seeley, who imagines a future where obesity is not gone but better managed, like high blood pressure is now. 

In the end, the drugs are another step toward what Dr. Aronne and many others have always pushed for: Treating obesity as a disease. 
 

A version of this article originally appeared on WebMD.com.

The advent of subcutaneously injectable glucagonlike peptide–1 (GLP-1) receptor agonists for the management of type 2 diabetes during 2005 was arguably one of the greatest therapeutic advances for the condition since metformin.

I was an early advocate of the class, given its potent glucose-lowering efficacy, secondary benefits of significant weight reduction, and a low risk for hypoglycemia (if not used alongside sulfonylureas or insulin).

During 2016, the first cardiovascular outcomes trial for a GLP-1 agonist, in the form of the LEADER study, was reported. These trials were mandated by the Food and Drug Administration in the aftermath of the rosiglitazone debacle in which the type 2 diabetes drug had its use restricted because of cardiovascular events attributed to it in a meta-analysis. These events weren’t seen in a subsequent trial, and the FDA’s restrictions were later lifted.

LEADER examined the once-daily GLP-1 agonist liraglutide and showed that, in addition to its glucose-lowering effects, liraglutide brought cardiovascular benefits to the table. Moreover, during 2019, the REWIND trial, the cardiovascular outcome trial for once-weekly subcutaneous dulaglutide, revealed the same cardiovascular benefits but also demonstrated a lower incidence of macroalbuminuria, albeit with no significant improvements in hard renal endpoints such as estimated glomerular filtration decline or rates of dialysis.

Despite these compelling benefits, the uptake of GLP-1 agonists has always been slower than that of other compelling agents such as the sodium-glucose cotransporter 2 inhibitors, mainly because the latter are oral drugs, while GLP-1 agonists were initially injectable medications. This difference has proven to be a barrier for patients and clinicians alike.

However, in 2019, oral semaglutide, in doses of 7 mg and 14 mg, was approved by the FDA as the first (and still only) commercially available oral GLP-1 agonist to improve glycemic control in adults with type 2 diabetes. This approval was hailed as a “game changer” at the time. The treatment had no proven cardiovascular benefits, only lack of cardiovascular harm in PIONEER 6. The SOUL cardiovascular outcome trial for oral semaglutide in doses of 7 mg and 14 mg is due to be completed during 2024. But semaglutide certainly had compelling glucose-lowering efficacy and secondary benefits of significant weight loss similar to those of its injectable counterparts.

Cardiovascular benefits of injectable semaglutide for type 2 diabetes were demonstrated in the SUSTAIN-6 trial in 2016, and the U.S. label for Ozempic was amended accordingly in 2020.

Again, I was an early adopter of oral semaglutide, and it has been great for my patients with type 2 diabetes to have the option of a noninjectable GLP-1 agonist. However, it is not without its drawbacks: Oral semaglutide must be taken on an empty stomach, at least 30 minutes before any other food, drink, or medication, and with no more than 120 mL water to maximize absorption and bioavailability.

I am of South Asian origin and have a strong family history of type 2 diabetes. If I develop type 2 diabetes in the future and require treatment escalation to a GLP-1 agonist, I will most likely opt for a weekly injectable, as it would best fit my lifestyle. But having choices of preparation has been a huge advantage in helping my patients best individualize their therapies.

I attended the recent American Diabetes Association congress in San Diego, which had two interesting oral GLP-1 agonist sessions on the program.

The first discussed the efficacy and safety of a new daily oral nonpeptide GLP-1 agonist, orforglipron, for weight reduction in adults with obesity. The phase 2 results were impressive, with clinically significant reductions in weight and cardiometabolic parameters, and a reassuring safety profile similar to that of the injectable GLP-1 agonists.

Notably, because orforglipron is a nonpeptide, it can be taken without any food, water, or medication restrictions. This indeed could turn out to be a real game changer by simplifying the complex administration of oral semaglutide, which no doubt has hampered compliance.

In fact, an Association of British Clinical Diabetologists real-world audit (also presented at the ADA Congress as a poster) of oral semaglutide use for type 2 diabetes found clinically significant hemoglobin A1c and weight reductions, but perhaps less than expected when compared with the clinical trial program, which could be a sign of poor adherence.

A phase 3 trial of orforglipron is underway (ATTAIN-2), exploring its efficacy and safety in adults with obesity or overweight and type 2 diabetes, but it is not due to be completed until 2027.

I also attended the session presenting the results of the OASIS 1 and PIONEER-PLUS trials of higher-dose oral semaglutide.

OASIS 1 explored the efficacy and safety of high-dose oral semaglutide, 50 mg once daily, for the treatment of adults with overweight or obesity without type 2 diabetes. The investigators found clinically significant reductions in body weight of around 15%-17% from baseline, compared with placebo. This result was similar to the weight loss observed in the STEP 1 trial of 2.4 mg weekly subcutaneous injectable semaglutide in adults with obesity (a much lower dose is needed when GLP-1 agonists are given as injectables because the oral forms are not very bioavailable). The side-effect profile was also similar.

PIONEER PLUS explored the efficacy and safety of high-dose oral semaglutide 25 mg and 50 mg in adults with inadequately controlled type 2 diabetes. Patients treated with 50 mg oral semaglutide had around a 2% reduction in A1c and an 8-kg (18-lb) reduction in weight from baseline. It is well known that people with obesity and type 2 diabetes lose less weight than those with obesity alone, so this result was impressive. Again, the safety profile was similar to that of the wider class, with predictably high levels of gastrointestinal side effects.

So, the future appears very bright for oral GLP-1 agonists. I hope that future developments bring the class to an even wider demographic and perhaps reduce some of the global inequities in managing type 2 diabetes and obesity. It should be easier (and cheaper) to mass-produce and distribute an oral medication, compared with an injectable one.

However, it should be noted that, in the United Kingdom, the National Health Service tariff cost of oral semaglutide (at usual doses for type 2 diabetes) remains similar to that of injectable semaglutide (at doses for type 2 diabetes rather than obesity). And notably, the U.K. National Institute for Health and Care Excellence, which decides whether new drugs will be funded on the NHS, has recently delayed its decision on approving tirzepatide, a dual GLP-1 and GIP agonist, for type 2 diabetes, citing the requirement for further evidence for its clinical and cost-effectiveness. This is not uncommon for NICE, and I fully expect tirzepatide to gain NICE approval on resubmission later in 2023.

One solution to contain costs might be a phased approach to the management of obesity, with initial stages using highly efficacious obesity drugs such as tirzepatide, injectable semaglutide, or high-dose oral semaglutide, and then transitioning to lower-efficacy and cheaper obesity drugs for weight maintenance.

On this note, a generic version of liraglutide (a once-daily injectable GLP-1 agonist) will be available during 2024. Moreover, it will be interesting to see the cost of orforglipron, assuming that it is approved, when it becomes commercially available in a few years, given that a nonpeptide agent should be cheaper to produce than a peptide-like semaglutide.

This phased approach is analogous to the treatment of rheumatoid arthritis, where potent targeted biologic therapy is often used early on to achieve remission of rheumatoid arthritis, followed by a switch to a conventional disease-modifying antirheumatic drug for maintenance therapy, for reasons of long-term safety and health economics.

Using this approach for obesity management might help the sustainability of health care systems.

Dr. Fernando is a general practitioner near Edinburgh. He reported receiving speaker fees from Eli Lilly and Novo Nordisk.

A version of this article first appeared on Medscape.com.

The advent of subcutaneously injectable glucagonlike peptide–1 (GLP-1) receptor agonists for the management of type 2 diabetes during 2005 was arguably one of the greatest therapeutic advances for the condition since metformin.

I was an early advocate of the class, given its potent glucose-lowering efficacy, secondary benefits of significant weight reduction, and a low risk for hypoglycemia (if not used alongside sulfonylureas or insulin).

During 2016, the first cardiovascular outcomes trial for a GLP-1 agonist, in the form of the LEADER study, was reported. These trials were mandated by the Food and Drug Administration in the aftermath of the rosiglitazone debacle in which the type 2 diabetes drug had its use restricted because of cardiovascular events attributed to it in a meta-analysis. These events weren’t seen in a subsequent trial, and the FDA’s restrictions were later lifted.

LEADER examined the once-daily GLP-1 agonist liraglutide and showed that, in addition to its glucose-lowering effects, liraglutide brought cardiovascular benefits to the table. Moreover, during 2019, the REWIND trial, the cardiovascular outcome trial for once-weekly subcutaneous dulaglutide, revealed the same cardiovascular benefits but also demonstrated a lower incidence of macroalbuminuria, albeit with no significant improvements in hard renal endpoints such as estimated glomerular filtration decline or rates of dialysis.

Despite these compelling benefits, the uptake of GLP-1 agonists has always been slower than that of other compelling agents such as the sodium-glucose cotransporter 2 inhibitors, mainly because the latter are oral drugs, while GLP-1 agonists were initially injectable medications. This difference has proven to be a barrier for patients and clinicians alike.

However, in 2019, oral semaglutide, in doses of 7 mg and 14 mg, was approved by the FDA as the first (and still only) commercially available oral GLP-1 agonist to improve glycemic control in adults with type 2 diabetes. This approval was hailed as a “game changer” at the time. The treatment had no proven cardiovascular benefits, only lack of cardiovascular harm in PIONEER 6. The SOUL cardiovascular outcome trial for oral semaglutide in doses of 7 mg and 14 mg is due to be completed during 2024. But semaglutide certainly had compelling glucose-lowering efficacy and secondary benefits of significant weight loss similar to those of its injectable counterparts.

Cardiovascular benefits of injectable semaglutide for type 2 diabetes were demonstrated in the SUSTAIN-6 trial in 2016, and the U.S. label for Ozempic was amended accordingly in 2020.

Again, I was an early adopter of oral semaglutide, and it has been great for my patients with type 2 diabetes to have the option of a noninjectable GLP-1 agonist. However, it is not without its drawbacks: Oral semaglutide must be taken on an empty stomach, at least 30 minutes before any other food, drink, or medication, and with no more than 120 mL water to maximize absorption and bioavailability.

I am of South Asian origin and have a strong family history of type 2 diabetes. If I develop type 2 diabetes in the future and require treatment escalation to a GLP-1 agonist, I will most likely opt for a weekly injectable, as it would best fit my lifestyle. But having choices of preparation has been a huge advantage in helping my patients best individualize their therapies.

I attended the recent American Diabetes Association congress in San Diego, which had two interesting oral GLP-1 agonist sessions on the program.

The first discussed the efficacy and safety of a new daily oral nonpeptide GLP-1 agonist, orforglipron, for weight reduction in adults with obesity. The phase 2 results were impressive, with clinically significant reductions in weight and cardiometabolic parameters, and a reassuring safety profile similar to that of the injectable GLP-1 agonists.

Notably, because orforglipron is a nonpeptide, it can be taken without any food, water, or medication restrictions. This indeed could turn out to be a real game changer by simplifying the complex administration of oral semaglutide, which no doubt has hampered compliance.

In fact, an Association of British Clinical Diabetologists real-world audit (also presented at the ADA Congress as a poster) of oral semaglutide use for type 2 diabetes found clinically significant hemoglobin A1c and weight reductions, but perhaps less than expected when compared with the clinical trial program, which could be a sign of poor adherence.

A phase 3 trial of orforglipron is underway (ATTAIN-2), exploring its efficacy and safety in adults with obesity or overweight and type 2 diabetes, but it is not due to be completed until 2027.

I also attended the session presenting the results of the OASIS 1 and PIONEER-PLUS trials of higher-dose oral semaglutide.

OASIS 1 explored the efficacy and safety of high-dose oral semaglutide, 50 mg once daily, for the treatment of adults with overweight or obesity without type 2 diabetes. The investigators found clinically significant reductions in body weight of around 15%-17% from baseline, compared with placebo. This result was similar to the weight loss observed in the STEP 1 trial of 2.4 mg weekly subcutaneous injectable semaglutide in adults with obesity (a much lower dose is needed when GLP-1 agonists are given as injectables because the oral forms are not very bioavailable). The side-effect profile was also similar.

PIONEER PLUS explored the efficacy and safety of high-dose oral semaglutide 25 mg and 50 mg in adults with inadequately controlled type 2 diabetes. Patients treated with 50 mg oral semaglutide had around a 2% reduction in A1c and an 8-kg (18-lb) reduction in weight from baseline. It is well known that people with obesity and type 2 diabetes lose less weight than those with obesity alone, so this result was impressive. Again, the safety profile was similar to that of the wider class, with predictably high levels of gastrointestinal side effects.

So, the future appears very bright for oral GLP-1 agonists. I hope that future developments bring the class to an even wider demographic and perhaps reduce some of the global inequities in managing type 2 diabetes and obesity. It should be easier (and cheaper) to mass-produce and distribute an oral medication, compared with an injectable one.

However, it should be noted that, in the United Kingdom, the National Health Service tariff cost of oral semaglutide (at usual doses for type 2 diabetes) remains similar to that of injectable semaglutide (at doses for type 2 diabetes rather than obesity). And notably, the U.K. National Institute for Health and Care Excellence, which decides whether new drugs will be funded on the NHS, has recently delayed its decision on approving tirzepatide, a dual GLP-1 and GIP agonist, for type 2 diabetes, citing the requirement for further evidence for its clinical and cost-effectiveness. This is not uncommon for NICE, and I fully expect tirzepatide to gain NICE approval on resubmission later in 2023.

One solution to contain costs might be a phased approach to the management of obesity, with initial stages using highly efficacious obesity drugs such as tirzepatide, injectable semaglutide, or high-dose oral semaglutide, and then transitioning to lower-efficacy and cheaper obesity drugs for weight maintenance.

On this note, a generic version of liraglutide (a once-daily injectable GLP-1 agonist) will be available during 2024. Moreover, it will be interesting to see the cost of orforglipron, assuming that it is approved, when it becomes commercially available in a few years, given that a nonpeptide agent should be cheaper to produce than a peptide-like semaglutide.

This phased approach is analogous to the treatment of rheumatoid arthritis, where potent targeted biologic therapy is often used early on to achieve remission of rheumatoid arthritis, followed by a switch to a conventional disease-modifying antirheumatic drug for maintenance therapy, for reasons of long-term safety and health economics.

Using this approach for obesity management might help the sustainability of health care systems.

Dr. Fernando is a general practitioner near Edinburgh. He reported receiving speaker fees from Eli Lilly and Novo Nordisk.

A version of this article first appeared on Medscape.com.

The advent of subcutaneously injectable glucagonlike peptide–1 (GLP-1) receptor agonists for the management of type 2 diabetes during 2005 was arguably one of the greatest therapeutic advances for the condition since metformin.

I was an early advocate of the class, given its potent glucose-lowering efficacy, secondary benefits of significant weight reduction, and a low risk for hypoglycemia (if not used alongside sulfonylureas or insulin).

During 2016, the first cardiovascular outcomes trial for a GLP-1 agonist, in the form of the LEADER study, was reported. These trials were mandated by the Food and Drug Administration in the aftermath of the rosiglitazone debacle in which the type 2 diabetes drug had its use restricted because of cardiovascular events attributed to it in a meta-analysis. These events weren’t seen in a subsequent trial, and the FDA’s restrictions were later lifted.

LEADER examined the once-daily GLP-1 agonist liraglutide and showed that, in addition to its glucose-lowering effects, liraglutide brought cardiovascular benefits to the table. Moreover, during 2019, the REWIND trial, the cardiovascular outcome trial for once-weekly subcutaneous dulaglutide, revealed the same cardiovascular benefits but also demonstrated a lower incidence of macroalbuminuria, albeit with no significant improvements in hard renal endpoints such as estimated glomerular filtration decline or rates of dialysis.

Despite these compelling benefits, the uptake of GLP-1 agonists has always been slower than that of other compelling agents such as the sodium-glucose cotransporter 2 inhibitors, mainly because the latter are oral drugs, while GLP-1 agonists were initially injectable medications. This difference has proven to be a barrier for patients and clinicians alike.

However, in 2019, oral semaglutide, in doses of 7 mg and 14 mg, was approved by the FDA as the first (and still only) commercially available oral GLP-1 agonist to improve glycemic control in adults with type 2 diabetes. This approval was hailed as a “game changer” at the time. The treatment had no proven cardiovascular benefits, only lack of cardiovascular harm in PIONEER 6. The SOUL cardiovascular outcome trial for oral semaglutide in doses of 7 mg and 14 mg is due to be completed during 2024. But semaglutide certainly had compelling glucose-lowering efficacy and secondary benefits of significant weight loss similar to those of its injectable counterparts.

Cardiovascular benefits of injectable semaglutide for type 2 diabetes were demonstrated in the SUSTAIN-6 trial in 2016, and the U.S. label for Ozempic was amended accordingly in 2020.

Again, I was an early adopter of oral semaglutide, and it has been great for my patients with type 2 diabetes to have the option of a noninjectable GLP-1 agonist. However, it is not without its drawbacks: Oral semaglutide must be taken on an empty stomach, at least 30 minutes before any other food, drink, or medication, and with no more than 120 mL water to maximize absorption and bioavailability.

I am of South Asian origin and have a strong family history of type 2 diabetes. If I develop type 2 diabetes in the future and require treatment escalation to a GLP-1 agonist, I will most likely opt for a weekly injectable, as it would best fit my lifestyle. But having choices of preparation has been a huge advantage in helping my patients best individualize their therapies.

I attended the recent American Diabetes Association congress in San Diego, which had two interesting oral GLP-1 agonist sessions on the program.

The first discussed the efficacy and safety of a new daily oral nonpeptide GLP-1 agonist, orforglipron, for weight reduction in adults with obesity. The phase 2 results were impressive, with clinically significant reductions in weight and cardiometabolic parameters, and a reassuring safety profile similar to that of the injectable GLP-1 agonists.

Notably, because orforglipron is a nonpeptide, it can be taken without any food, water, or medication restrictions. This indeed could turn out to be a real game changer by simplifying the complex administration of oral semaglutide, which no doubt has hampered compliance.

In fact, an Association of British Clinical Diabetologists real-world audit (also presented at the ADA Congress as a poster) of oral semaglutide use for type 2 diabetes found clinically significant hemoglobin A1c and weight reductions, but perhaps less than expected when compared with the clinical trial program, which could be a sign of poor adherence.

A phase 3 trial of orforglipron is underway (ATTAIN-2), exploring its efficacy and safety in adults with obesity or overweight and type 2 diabetes, but it is not due to be completed until 2027.

I also attended the session presenting the results of the OASIS 1 and PIONEER-PLUS trials of higher-dose oral semaglutide.

OASIS 1 explored the efficacy and safety of high-dose oral semaglutide, 50 mg once daily, for the treatment of adults with overweight or obesity without type 2 diabetes. The investigators found clinically significant reductions in body weight of around 15%-17% from baseline, compared with placebo. This result was similar to the weight loss observed in the STEP 1 trial of 2.4 mg weekly subcutaneous injectable semaglutide in adults with obesity (a much lower dose is needed when GLP-1 agonists are given as injectables because the oral forms are not very bioavailable). The side-effect profile was also similar.

PIONEER PLUS explored the efficacy and safety of high-dose oral semaglutide 25 mg and 50 mg in adults with inadequately controlled type 2 diabetes. Patients treated with 50 mg oral semaglutide had around a 2% reduction in A1c and an 8-kg (18-lb) reduction in weight from baseline. It is well known that people with obesity and type 2 diabetes lose less weight than those with obesity alone, so this result was impressive. Again, the safety profile was similar to that of the wider class, with predictably high levels of gastrointestinal side effects.

So, the future appears very bright for oral GLP-1 agonists. I hope that future developments bring the class to an even wider demographic and perhaps reduce some of the global inequities in managing type 2 diabetes and obesity. It should be easier (and cheaper) to mass-produce and distribute an oral medication, compared with an injectable one.

However, it should be noted that, in the United Kingdom, the National Health Service tariff cost of oral semaglutide (at usual doses for type 2 diabetes) remains similar to that of injectable semaglutide (at doses for type 2 diabetes rather than obesity). And notably, the U.K. National Institute for Health and Care Excellence, which decides whether new drugs will be funded on the NHS, has recently delayed its decision on approving tirzepatide, a dual GLP-1 and GIP agonist, for type 2 diabetes, citing the requirement for further evidence for its clinical and cost-effectiveness. This is not uncommon for NICE, and I fully expect tirzepatide to gain NICE approval on resubmission later in 2023.

One solution to contain costs might be a phased approach to the management of obesity, with initial stages using highly efficacious obesity drugs such as tirzepatide, injectable semaglutide, or high-dose oral semaglutide, and then transitioning to lower-efficacy and cheaper obesity drugs for weight maintenance.

On this note, a generic version of liraglutide (a once-daily injectable GLP-1 agonist) will be available during 2024. Moreover, it will be interesting to see the cost of orforglipron, assuming that it is approved, when it becomes commercially available in a few years, given that a nonpeptide agent should be cheaper to produce than a peptide-like semaglutide.

This phased approach is analogous to the treatment of rheumatoid arthritis, where potent targeted biologic therapy is often used early on to achieve remission of rheumatoid arthritis, followed by a switch to a conventional disease-modifying antirheumatic drug for maintenance therapy, for reasons of long-term safety and health economics.

Using this approach for obesity management might help the sustainability of health care systems.

Dr. Fernando is a general practitioner near Edinburgh. He reported receiving speaker fees from Eli Lilly and Novo Nordisk.

A version of this article first appeared on Medscape.com.