Topical effects Most reported topical effects are mild and local: redness, tingling, dryness, or transient irritation at the application site, typically more common with concentrations above 4%
Compound Receptors Peak trial weight loss Lean mass as share of loss Semaglutide (Ozempic/Wegovy) GLP-1 ~14.9% (STEP-1, 68 wk) ~39% Tirzepatide (Mounjaro/Zepbound) GLP-1 + GIP ~20.9% (SURMOUNT-1, 72 wk) ~25-40% Retatrutide GLP-1 + GIP + GCGR ~24.2% (Phase 2, 48 wk) Comparable class range Best for understanding the takeaway: the percentage of loss that is lean mass is roughly constant across the class
Moiz A, Filion KB, Tsoukas MA, Yu OH, Peters TM, Eisenberg MJ
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