Retatrutide Stacking and Combinations
Which compounds Retatrutide is paired with, and the rationale behind each combination.
Stacking Retatrutide
Retatrutide is usually run on its own rather than in a large stack — there isn't a well-characterized partner compound for it in the current literature. If you do combine it with something, add one compound at a time and see how you respond before layering anything else on top.
Stacking Principles
As a rule, more compounds is not better. Each addition adds cost, injection burden, and another variable to untangle if something feels off. Ask REGEN AI to sanity-check any stack against your goals and bloodwork before you start.
References
- Triple–Hormone–Receptor Agonist Retatrutide for Obesity — A Phase 2 Trial · Jastreboff AM, et al. · 2023
- Jastreboff AM, et al. Triple–Hormone-Receptor Agonist Retatrutide for Obesity, A Phase 2 Trial. N Engl J Med. 2023;389:514-526. · Jastreboff AM, Kaplan LM, Frías JP, Wu Q, Du Y, Gurbuz S, Coskun T, Haupt A, Milicevic Z, Hartman ML · 2023
- Retatrutide for the treatment of obesity, obstructive sleep apnea and knee osteoarthritis: Rationale and design of the TRIUMPH registrational clinical trials. · Giblin K, Kaplan LM, Somers VK et al. · 2026
- Appetite, eating attitudes, and eating behaviours during treatment with retatrutide in adults with type 2 diabetes: Results of a phase 2 study · Kanu C, Boye KS, Poon JL, Goetz I, Williamson S, Lou J, Hartman ML, Martin CK, Coskun T · 2025
- Rosenstock J, et al. Retatrutide, a GIP, GLP-1 and glucagon receptor agonist, for people with type 2 diabetes: a randomised, double-blind, placebo and active-controlled, parallel-group, phase 2 trial. Lancet. 2023;402(10401):529-544. · Rosenstock J, Frias J, Jastreboff AM, Du Y, Lou J, Gurbuz S, Thomas MK, Hartman ML, Haupt A, Milicevic Z, Coskun T · 2023
- Effects of retatrutide on body composition in people with type 2 diabetes. Lancet Diabetes Endocrinol. 2025. · 2025