THE LAB — TRIM FITT CLINICAL RESEARCH
Tirzepatide vs Semaglutide: Which GLP-1 Therapy is Right for You?
Reviewed by the TRIM FITT Clinical Team · Evidence-Based Medicine
If you’ve been exploring medical weight loss options, you’ve likely encountered both semaglutide and tirzepatide. While both are GLP-1 receptor agonists that have revolutionized metabolic medicine, they work differently and produce different results. Understanding the distinction is key to choosing the right therapy for your goals.
What the Research Shows
Semaglutide (brand name Wegovy) acts on GLP-1 receptors only, producing average weight loss of 14-15% in the landmark STEP trials. Tirzepatide (brand name Mounjaro/Zepbound) is a dual agonist, targeting both GLP-1 and GIP receptors. In the SURMOUNT-1 trial published in the New England Journal of Medicine, tirzepatide at the highest dose (15 mg) produced an average weight loss of 20.9% — significantly outperforming semaglutide in head-to-head comparisons. The SURPASS-2 trial confirmed tirzepatide’s superiority for both weight loss and glycemic control.
Bottom line: Both are highly effective. Tirzepatide generally produces greater weight loss (up to 20%+) due to its dual mechanism, while semaglutide has a longer track record and may be better tolerated by some patients. The right choice depends on your individual metabolic profile, goals, and tolerability.
What This Means at TRIM FITT
At TRIM FITT, every protocol is built on peer-reviewed evidence. Our physicians will review your labs and health history to recommend the right GLP-1 agent and titration schedule for your unique physiology. Book a consultation to find out which protocol is right for you.
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📚 Peer-Reviewed Sources
Educational purposes only. Not medical advice. Consult with a TRIM FITT provider before starting any treatment.
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