·8 min read
Semaglutide vs tirzepatide vs retatrutide: the 2026 GLP-1 ladder
The three GLP-1 drugs that matter in 2026: semaglutide (Ozempic/Wegovy), tirzepatide (Mounjaro/Zepbound), and retatrutide (Lilly's triple-agonist). How they differ in mechanism, weight loss, side effects, and cost.