The obesity drug helped people trim about two inches more off their waists than Wegovy in the first head-to-head study of the rival medicines.

Eli Lilly & Co.’s obesity drug Zepbound helped people trim about two inches more off their waists than Novo Nordisk A/S’s Wegovy in the first head-to-head study of the rival medicines.

The popular weight loss medications produced different results in patients who participated in a trial, and here’s what researchers found.