What makes this study especially valuable is that it moves the field beyond describing that heterogeneity and begins to explain it mechanistically, with direct human genetic evidence linking variation in GLP1R and GIPR to both efficacy and tolerability
[DOI] [PMC free article] [PubMed] [Google Scholar] Wilson JM, et al
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This results in: Increased satiety signaling in the brain Slowed gastric emptying Improved insulin sensitivity and post-meal blood sugar regulation Weight loss with semaglutide is driven primarily by appetite regulation and metabolic effects mediated through GLP-1 pathways. Tirzepatide: Dual GIP and GLP-1 Agonist Tirzepatide, the medication in Zepbound, activates two incretin receptors : GLP-1 GIP (glucose-dependent insulinotropic polypeptide) GIP appears to further enhance insulin sensitivity and may amplify appetite regulation when combined with GLP-1
