What happens when you stop taking retatrutide?
No human stop-treatment study of retatrutide is in the sources; in mice, weight returned after retatrutide was withdrawn, though the anti-tumour effect the researchers measured persisted.
Short answer
No human stop-treatment study of retatrutide is in the sources; in mice, weight returned after retatrutide was withdrawn, though the anti-tumour effect the researchers measured persisted.[1]
What is and is not known
A review of GLP-1-based therapies as a class lists weight regain upon discontinuation among their important limitations; it is not retatrutide-specific data.[2]
Another review proposes that keeping lean mass during incretin therapy could blunt weight and fat regain once treatment stops, a hypothesis rather than a measured retatrutide result.[3]
After a single dose in the phase 1 study, the weight reduction persisted up to day 43, showing effects can outlast a single injection.[4]
More questions on Retatrutide
More on Retatrutide
Sources
- 1Incretin triple agonist retatrutide (LY3437943) alleviates obesity-associated cancer progression.npj metabolic health and disease · 2025PMID 40094000Accessed 29 Oct 2026
- 2Obesity pharmacotherapy reimagined: The era of multi-receptor agonists and next-generation metabolic modulators, perspectives and controversies.Metabolism open · 2026PMID 41948476Accessed 11 Oct 2026
- 3Incretin-Based Weight Loss Pharmacotherapy: Can Resistance Exercise Optimize Changes in Body Composition?Diabetes care · 2024PMID 38687506Accessed 2 Oct 2026
- 4LY3437943, a novel triple glucagon, GIP, and GLP-1 receptor agonist for glycemic control and weight loss: From discovery to clinical proof of concept.Cell metabolism · 2022PMID 35985340Accessed 2 Oct 2026
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