Eli Lilly reports positive results for obesity drug retatrutide trials

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Lilly's triple agonist, retatrutide, drove substantial improvements in weight, A1C, knee osteoarthritis pain, and obstructive sleep apnea, demonstrating its remarkable potential to treat obesity and i

June 6, 2026 2:30 PM EDT

In TRIUMPH-1, participants on retatrutide 12 mg lost an average of 70.3 lbs (28.3%) over 80 weeks, with 65.3% achieving a BMI below 30, no longer meeting the BMI criteria for obesity

In addition to weight loss, retatrutide reduced knee osteoarthritis pain by up to 4.3 points (73.1%) and moderate-to-severe obstructive sleep apnea severity by up to 36.1 events per hour (60.6%)

In TRANSCEND-T2D-1, participants on retatrutide achieved A1C reductions of up to 2.0% and weight loss of up to 36.6 lbs (16.8%) at 40 weeks, with up to 46% achieving a normal... More