identifies retatrutide as a once-weekly triple GIP/GLP-1/glucagon agonist and contrasts it with Zepbound/Wegovy.
Review topic: mechanism.
Checked against: Retatrutide phase 2 results: 24.2% weight loss (NEJM), Lilly's triple agonist, retatrutide, delivered powerful weight loss in pivotal Phase 3 obesity trial.