Weight regain now has a timetable — and a Nature mouse study tests the limits of semaglutide enthusiasm
Read the Sunday Brief →

Study wrapper · #1387

CARDIOVASCULAR EFFECTS OF INCRETIN RECEPTOR AGONISTS: BEYOND GLYCEMIC CONTROL.

Ravic M, Srejovic IM, Milosavljevic I, et al. Canadian journal of physiology and pharmacology. 2026.

Editor's note

A narrative review, but one that assembles genuinely current material: SUMMIT cardiac-MRI data showing reverse ventricular remodelling with tirzepatide, and isolated human atrial tissue work showing direct inotropic effects of retatrutide. The retatrutide cardiovascular story remains surrogate-only until TRIUMPH outcome data report, which the authors acknowledge. A useful synthesis of the mechanism-beyond-glycemia argument.

Plain-language abstract

A review of how GLP-1 drugs, tirzepatide, and triple agonists like retatrutide affect the cardiovascular system, arguing that less than a fifth of their cardiovascular benefit comes from blood-sugar control — the rest reflects weight, blood pressure, lipids, inflammation, and direct effects on heart muscle.