GLP-1 and Muscle Preservation: What the Research Suggests
One of the most common concerns about GLP-1 medications is muscle loss. Here's what current research says — and what patients can do to support lean mass.
The Concern
Any significant caloric deficit — whether from a GLP-1 medication, diet, or any other source — can result in loss of both fat and lean tissue. Some studies on GLP-1 therapy have reported lean mass reductions alongside the weight loss.
Context Matters
Research suggests the proportion of fat mass lost relative to lean mass on GLP-1 therapy is similar to other interventions producing comparable weight loss. The body composition outcome is not unique to GLP-1 medications.
What Patients Can Do
Two lifestyle factors appear most important for preserving lean mass while losing fat: adequate protein intake (typically 1.6-2.2g per kg of body weight) and resistance training (2-3 sessions weekly). Both are supported by extensive research.
Work With Your Provider
Discuss your protein goals, training plan, and any concerns about body composition with your provider. They can help integrate these considerations into your overall treatment plan. Individual results vary.
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