What is Retatrutide?
Last updated: January 2026
Quick Answer
Retatrutide is Eli Lilly's next-generation weight loss drug in Phase 3 trials. It activates three receptors simultaneously (GLP-1, GIP, and glucagon), producing stronger weight loss than any currently approved medication. Phase 2 showed 24.2% average weight loss over 48 weeks.
What is Retatrutide
Retatrutide is Eli Lilly's next-generation weight loss drug in Phase 3 trials. It activates three receptors simultaneously (GLP-1, GIP, and glucagon), producing stronger weight loss than any currently approved medication. Phase 2 showed 24.2% average weight loss over 48 weeks.
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Related Questions
Retatrutide vs Tirzepatide: Which is More Effective?
Phase 2 data shows retatrutide (24.2% weight loss) outperforms tirzepatide (20.9%). 58% of retatrutide patients lost ≥20% body weight versus 57% for tirzepatide at highest doses. Retatrutide adds a glucagon receptor component that enhances fat burning and metabolic rate.
When Will Retatrutide Be FDA Approved?
Eli Lilly launched the Phase 3 TRIUMPH program in 2024. FDA submission is expected in 2026, with potential approval in 2026-2027. Phase 3 results from the TRIUMPH-3 trial are expected in late 2025.