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The research behind GLP-1 care

What the published evidence actually shows.

Two of the largest weight-management trials to date were published in the New England Journal of Medicine. Here is what they found.

Semaglutide · STEP 1 trial

14.9%

average body-weight reduction over 68 weeks

In the STEP 1 trial, adults taking weekly semaglutide lost 14.9% of their body weight on average, and 86% of participants lost at least 5% of their body weight.

Wilding et al., New England Journal of Medicine, 2021

Tirzepatide · SURMOUNT-1 trial

up to 22.5%

body-weight reduction over 72 weeks

In SURMOUNT-1, adults taking weekly tirzepatide lost an average of 16.0% to 20.9% of their body weight depending on dose, up to 22.5%, and roughly 9 in 10 participants lost weight.

Jastreboff et al., New England Journal of Medicine, 2022

Beyond the scale

Science named GLP-1 medicine its 2023 Breakthrough of the Year.

Science cited growing evidence that the class blunts obesity-associated health problems, including signals for heart and metabolic health, not weight alone.

Science, Breakthrough of the Year 2023

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