Some weight-loss drugs that work on gut hormones seem to help protect muscle in older people, but others say they make muscle loss worse — scientists aren’t sure yet which is true.

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GLP-1 receptor agonists, body composition, skeletal muscle and risk of sarcopaenia: from promising findings in animal models to debated concern in human studies.

Narrative Review

Animal

2025 Sep

The study looks at the same diabetes and weight-loss drugs mentioned in the claim and finds that some research shows muscle loss while others show protection, so it's still unclear what the real effect is.

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Source Study

GLP-1 receptor agonists, body composition, skeletal muscle and risk of sarcopaenia: from promising findings in animal models to debated concern in human studies.

Score: 1

DOI: 10.1016/j.diabet.2025.101681

Similar Assertions

We don't yet know if diabetes drugs like Ozempic affect muscle health in older or frail people — they might help, hurt, or do nothing, but there's not enough proof either way.

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Diabetes drugs that work on a hormone called GLP-1 seem to help improve muscle health in mice, but we're not sure yet if they do the same in people.

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When adults lose weight using GLP-1 drugs like Ozempic, their muscles seem to change in a healthy way — not losing strength or quality, and possibly even improving how they work.

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If you're older or not very physically strong to begin with, taking certain weight-loss drugs like GLP-1 agonists might increase your risk of losing muscle. So doctors should think about your age and fitness level before prescribing these drugs.

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