Up to 40 percent muscle mass away? Experts clean up with explosive Ozempic myth
A July 2026 Gallup survey found that 11 percent of U.S. adults now take GLP-1 supplements for weight loss, almost four times as much
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Summary
A July 2026 Gallup survey found that 11 percent of U.S. adults now take GLP-1 supplements for weight loss, nearly four times as many as 2024. Studies suggest that weight loss achieved with GLP-1 drugs can account for roughly a quarter to 40 percent of the reduced weight on fat-free mass. While GLP-1 drugs continue to fundamentally change obesity treatment, a new concern has emerged alongside reports of dramatic weight loss: muscle loss.
Furthermore, This figure may seem alarming at first glance, but experts emphasize that fat-free mass is not synonymous with muscle and that most of the weight lost is still fat. “Most of what patients lose is fat, and in the majority, the ratio of fat to muscle mass in the body actually improves,” obesity medicine specialist Dr. Jessica Duncan told Newsweek. However, obesity professionals are convinced that the reality is more nuanced and that some loss of muscle mass during weight loss is neither specific to GLP-1 agents nor necessarily a sign that something has gone wrong. For whom the risk is particularly relevant, some groups deserve special attention, Duncan said.
In addition, Eisenstat, who in her practice when prescribing GLP-1 drugs often tracks changes in her patients' body composition, said much of the public debate confuses fat loss with muscle loss.
Cross-referenced from 2 sources.
Factual coreconfirmed by several independent voices
A July 2026 Gallup survey found that 11 percent of U.S. adults now take GLP-1 supplements for weight loss, nearly four times as many as 2024.
reliability low1/2 sourcesStudies suggest that weight loss achieved with GLP-1 drugs can account for roughly a quarter to 40 percent of the reduced weight on fat-free mass.
reliability low1/2 sourcesWhile GLP-1 drugs continue to fundamentally change obesity treatment, a new concern has emerged alongside reports of dramatic weight loss: muscle loss.
reliability low1/2 sourcesThis figure may seem alarming at first glance, but experts emphasize that fat-free mass is not synonymous with muscle and that most of the weight lost is still fat. “Most of what patients lose is fat, and in the majority, the ratio of fat to muscle mass in the body actually improves,” obesity medicine specialist Dr. Jessica Duncan told Newsweek.
reliability low1/2 sourcesHowever, obesity professionals are convinced that the reality is more nuanced and that some loss of muscle mass during weight loss is neither specific to GLP-1 agents nor necessarily a sign that something has gone wrong.
reliability low1/2 sourcesFor whom the risk is particularly relevant, some groups deserve special attention, Duncan said.
reliability low1/2 sourcesEisenstat, who in her practice when prescribing GLP-1 drugs often tracks changes in her patients' body composition, said much of the public debate confuses fat loss with muscle loss.
reliability low1/2 sources
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