The number that doesn't move

The number is often cited as 1.2 grams per kilogram of body weight — a target that generally doesn't shift just because appetite did. Research often supports protein intakes around 1.2 to 1.6 g/kg/day during caloric restriction for preserving lean mass — roughly 90 to 150 grams daily for many people. Per meal, the often cited range of ~20–40g per meal in many studies is commonly used as a target. Lower amounts may provide a weaker muscle protein synthesis response. Early dietary guidelines set p

What two sessions a week can do

Two sessions a week is enough to make a difference. Research suggests even twice weekly resistance training may help reduce lean mass loss during caloric restriction. Resistance exercise is a major stimulus for muscle protein synthesis — it activates mTOR signaling independently of dietary protein. The combination of adequate protein plus resistance training appears to better support lean mass preservation than either alone. Bodyweight squats, push-ups, and lunges two to three times a week provi

Foodbe

June 4, 2026

👖 Why do I lose muscle on GLP-1?

Note: This article is for informational purposes only and does not constitute medical advice.

The body doesn't negotiate with appetite. It just keeps running — and running requires amino acids whether you feel like eating or not.

GLP-1 is doing exactly what it's supposed to do. The question is what's left on the plate when it's done.

GLP-1 may suppress appetite enough that many people struggle to get adequate protein. When overall intake drops substantially, the body may draw on muscle tissue to maintain amino acid availability — a response associated with inadequate protein intake during caloric restriction, not a direct effect of the medication.

The goal is usually to reduce fat mass while preserving lean mass. Studies show a meaningful proportion of weight lost on GLP-1 medications can come from lean tissue alongside fat. Higher protein intake and resistance exercise are two of the most evidence-supported strategies for reducing this.

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About this article

Foodbe.ai exists to inform consumers about the food they buy and eat. Every claim is cited. Sources: NIH, USDA, FDA, Smithsonian, and JSTOR. Found an error? Email us at admin@foodbe.ai to report any source or fact issues.