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Lilly's release is datelined "INDIANAPOLIS, May 21, 2026" and says the company "today announced positive topline results from TRIUMPH-1".
STAT (Elaine Chen), 21 May 2026: Lilly reported Thursday that those on the highest dose who stayed on retatrutide lost 28.3% at 80 weeks; 11% on that dose discontinued for adverse events and the all-participants figure was 25%, against discontinuation of up to 7% in Wegovy and Zepbound pivotal trials.[1]
BioPharma Dive, 21 May 2026: results announced Thursday from Triumph-1, the largest and longest retatrutide trial; 2,339 participants, 28%/26%/19% weight loss on 12/9/4 mg vs 2% placebo, 25%/24%/18% counting discontinuations; RBC's Trung Huynh called it "a clean win"; data due at ADA next month.
AJMC (Giuliana Grossi), 21 May 2026: 2,339-participant trial, 70.3 lb (28.3%) mean loss on 12 mg at 80 weeks, 45.3% reaching at least 30% loss, 65.3% reaching BMI under 30, and 30.3% at 104 weeks in the 532-person extension.
TCTMD (Caitlin E. Cox), 21 May 2026: reports the Lilly topline results - 19.0%, 25.9% and 28.3% weight loss by dose at 80 weeks vs 2.2% placebo, 65.3% on 12 mg below BMI 30 - with detailed results due at the ADA Scientific Sessions in June 2026.
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