Semaglutide for Weight Loss: 2026 Research Summary

Semaglutide is a GLP-1 receptor agonist that has transformed weight management research. Here is what the clinical data shows.

Clinical Trial Results

• STEP 1 trial: 14.9% body weight reduction vs 2.4% placebo over 68 weeks
• STEP 2 (T2D patients): 9.6% weight loss
• STEP 3 (with lifestyle intervention): 16% average weight loss

How It Works

Semaglutide mimics GLP-1, a gut hormone that signals satiety. It slows gastric emptying, reduces appetite centrally, and improves insulin sensitivity.

Dosing Protocol

Typical titration: 0.25mg weekly x4 weeks, then 0.5mg x4 weeks, then 1.0mg, up to 2.4mg maintenance.

Managing Side Effects

• Nausea: Most common early on; slow titration helps
• Constipation: Increase fiber and water intake
• Muscle loss: Add protein (1.2-1.6g/kg) and resistance training

Full semaglutide profile | All weight loss compounds