Lilly’s retatrutide drives sustained, substantial weight loss in Phase 3 obesity trial

In the TRIUMPH-1 Phase 3 trial, Lilly’s triple hormone agonist retatrutide produced clinically meaningful weight loss across all dose groups over 80 weeks: 12 mg yielded an average 70.3 lb loss (28.3%) with 45.3% achieving ≥30% weight reduction, and 65.3% reached BMI 22 at Week 80; 9 mg achieved 64.4 lb (25.9%) and 4 mg 47.2 lb (19.0%). An extension up to 104 weeks showed continued weight loss in some participants, including those with higher baseline BMI. The data support retatrutide’s potential as a non-surgical obesity treatment, with detailed safety labeling included in the release.