
Semaglutide vs Tirzepatide (2026): 13.7% vs 20.2% Weight Loss, Head-to-Head SURMOUNT-5
Updated July 2026: Tirzepatide produces 20.2% weight loss vs semaglutide's 13.7% in the SURMOUNT-5 head-to-head trial (NEJM 2024): a 47% greater relative reduction confirmed by 2026 systematic meta-analyses. Tirzepatide activates GLP-1 + GIP dual receptors; semaglutide activates GLP-1 only. Full cost and side-effect comparison.




