Eli Lilly says retatrutide helped obesity trial participants lose up to 28.3% body weight in the Phase 3 TRIUMPH-1 study.

A next-gen Eli Lilly obesity drug led to bariatric-surgery levels of weight loss in a study, but also saw patients dropping out because of side effects.

The results — the most weight loss ever seen in a medication trial — put the drug’s effectiveness on par with bariatric surgery.

Eli Lilly's retatrutide shows promise, helping obesity patients lose over 28% of their weight in a key trial.