WHAT IT IS
A dual molecule: it activates two incretin pathways at once.
Tirzepatide is the same molecule sold as Mounjaro (type-2 diabetes) and Zepbound (weight management). Unlike pure GLP-1 analogues, it also activates the GIP (glucose-dependent insulinotropic polypeptide) receptor — a second incretin pathway involved in appetite regulation and insulin sensitivity.
That dual activity is what sets tirzepatide apart from semaglutide in head-to-head trials: average weight loss in phase-III studies is somewhat larger, though eligibility criteria and the side-effect profile are similar.







