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Retatrutide Phase 3 TRIUMPH-4 weight-loss trajectory and peptide structure - 68-week clinical trial visualization
Clinical Trials

Retatrutide Phase 3 Results: The Complete TRIUMPH Program Guide 2026

Eli Lilly's retatrutide (LY3437943) delivered 28.7% weight loss in its first Phase 3 readout. This 2026 guide breaks down every TRIUMPH trial, what the data means, and when FDA approval could land.

Apr 20, 2026
Sebastian Dedrich

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