The Study
1676-P: Changes in Body Composition During and After Weight Loss with Tirzepatide
This study shows that when people took a medicine called tirzepatide, they lost weight and got healthier, but when they stopped taking it, some of the weight and health gains came back. It doesn't prove the medicine caused all these changes for sure, but it's the best kind of test we have for guessing that.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
Tirzepatide helps people lose weight and become more insulin-sensitive, but when they stop taking it, they mostly regain muscle, not fat.
Where does this study sit?
Systematic Reviews & Meta-analyses
Max 100Randomized Trials
Max 90Cohort Studies
Max 72Case-Control
Max 58Cross-Sectional
Max 44Case Reports & Series
Max 30Expert Opinion
Max 564 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. Considered the gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Losing muscle is bad for metabolism and strength; regaining mostly muscle and storing fat under skin is less harmful than visceral fat, but losing muscle still reduces long-term health benefits.
- 2Lost 12.5 kg total: 40% muscle, 60% fat.
- 3After stopping: 42% of weight loss came back, 67% of it was muscle, 38% was fat.
- 4New fat went mostly under skin (34%), not around organs (7.5%).
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Diabetes
Year
2026
Authors
E. Yandle, Tracey McLaughlin, Chun Johnston, Jasmine Yang, Nicole Turk, Heping Chen, Dalia Perelman
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.