> For the complete documentation index, see [llms.txt](https://docs.rplpeptides.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.rplpeptides.com/docs/retatrutide/faq-library/retatrutide-faq.md). # retatrutide-faq RPL Peptide Official Technical Documentation FAQ Library *** ## Frequently Asked Questions — Retatrutide ### Product Information #### What is retatrutide? Retatrutide is a synthetic 39-amino-acid triple receptor agonist peptide for research involving GLP-1R, GIPR, and GCGR signaling pathways. #### What is the CAS number? **2381089-83-2** #### What makes retatrutide different from tirzepatide? Retatrutide adds glucagon receptor (GCGR) activation to the GIP/GLP-1 dual agonist profile, enabling triple pathway investigation. ### Quality & Documentation #### What purity does RPL supply? ≥99.0% by HPLC at 214 nm. #### Do you provide COA? Yes — every batch ships with full COA. ### Handling & Storage #### How should retatrutide be stored? -20°C (2+ years) or 2–8°C (12 months). Protect from light and moisture. #### Recommended reconstitution solvent? Bacteriostatic water (0.9% benzyl alcohol). #### Can I vortex? No — gently swirl only. ### Supply #### Package sizes? 10, 15, 20, 30, 40, 50, 60 mg per vial. #### MOQ? 1 box (10 vials). OEM bulk available. #### Lead time? In-stock: 2 business days. Custom: 7–25 days. *** © 2026 RPL Peptide Official Technical Documentation rplpeptides.com --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.rplpeptides.com/docs/retatrutide/faq-library/retatrutide-faq.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.