In 2020, Diabetologia published a body composition analysis of 88 volunteers with type 2 diabetes who used semaglutide for one year. These participants lost an average of 12.5 pounds. Of that weight loss, there was a 7.5-pound reduction in fat mass and a 5-pound reduction in lean mass.

In 2021, a major trial of semaglutide’s weight loss potency examined the body composition of a minority of participants. These patients did not have diabetes, and they took a much larger dose of the drug. The 95 participants to undergo a body scan lost an average of 18 pounds of fat — and 12 pounds of lean mass.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6997246/

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