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Semaglutide for weight loss: The STEP and SELECT trials

What you need to know

The weekly injectable GLP-1 receptor agonist semaglutide is approved for use in type 2 diabetes at a dose optimized for glucose lowering, of 1.0 mg/week. But the results of the first STEP trial show that at a higher dose of 2.4 mg/week it is also an effective weight loss agent, easily surpassing the effects of any currently available medication.


Browse this page for details of the completed and ongoing STEP trials, and the SELECT cardiovascular outcomes study, plus interviews with the researchers.

STEP 1 trial results

STEP 2 trial results

STEP 3 trial results

STEP 4 trial results

At a glance

Read our round-up of the STEP phase 3 trials of semaglutide 2.4 mg in people with obesity, plus the SELECT cardiovascular outcomes trial.

View the quick guide here

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