Protein & Nutrition Blog – Marmels

Research from 2025 and 2026 found people taking a glucagon-like peptide-1 (GLP-1) medication averaging 0.6 grams of protein per kilogram of body weight per day, less than half current guidance, with 88 percent falling short. Protein and collagen both come up in this conversation, but they do different jobs and the evidence is not equally strong. Here is what the trial data shows about lean mass, where collagen honestly fits, and what to eat when appetite is capped.