The SURMOUNT-2 Trial: Tirzepatide in Type 2 Diabetes

Part of the DietApp.com GLP-1 Trial Database, a comprehensive, regularly reviewed resource.

What It Is

SURMOUNT-2 tested tirzepatide's weight-loss effect specifically in adults with obesity or overweight who also have type 2 diabetes, a population studied separately from SURMOUNT-1, which excluded participants with diabetes.

Key Results

SURMOUNT-2 showed mean weight reduction of up to approximately 15.7% in participants with type 2 diabetes, compared to up to 22.5% in the non-diabetes SURMOUNT-1 population at a comparable dose and duration. This gap is a well-documented, expected pattern, not unique to tirzepatide, GLP-1 weight-loss trials consistently show somewhat lower average weight loss in participants with type 2 diabetes than in those without.

Why People With Diabetes See Somewhat Less Weight Loss

The leading explanation isn't that the medication works less well in people with diabetes, it's tied to underlying metabolic differences, including insulin resistance patterns, that are common in type 2 diabetes and can influence weight-loss response to any intervention, not specific to GLP-1 medications alone.

Why This Distinction Matters for You"

If you have type 2 diabetes and are comparing your own weight-loss results against headline trial numbers you've seen for Zepbound, SURMOUNT-2's figures, not SURMOUNT-1's, are the more relevant comparison for your situation.

References

• PMC: Tirzepatide for the Treatment of Obstructive Sleep Apnea, SURMOUNT-OSA Trial Design (background on SURMOUNT-1 and SURMOUNT-2 comparative results)

Related Resources

• Tirzepatide Medication Guide
• Mounjaro Medication Guide

Related Articles

• The SURMOUNT Trials
• What Is A1C and Why Does It Matter on a GLP-1 Medication?

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About DietApp.com

DietApp.com combines evidence-based GLP-1 medication education with practical treatment tracking tools. The information on DietApp.com is intended for educational purposes only and should not replace professional medical advice, diagnosis, or treatment.

Last medically reviewed and updated: July 11, 2026.