About Rainbow Peptide — USA Research Peptide Supplier
Rainbow Peptide is a USA-based supplier of research-grade peptides and SARMs. Every compound is independently HPLC-tested for ≥98% purity by an ISO/IEC 17025 accredited third-party laboratory, with a batch-specific Certificate of Analysis included on every order.
Built for researchers who demand accuracy — not approximations. If it doesn't pass at ≥98% purity, it doesn't ship.
Our Mission
Rainbow Peptide exists to give serious researchers access to the highest-quality synthetic peptides available. The research peptide market is riddled with inconsistency — underdosed vials, mystery impurities, and certificates of analysis that exist on paper only. We built Rainbow Peptide to be the alternative.
Every product in our catalog is independently tested by a certified third-party laboratory using HPLC-UV analysis and mass spectrometry identity confirmation. We publish the COA for every batch. Learn more on our lab testing page or read our quality promise.
The Research System
We organize our catalog into five targeted research lines — each aligned to a specific biological pathway — plus a dedicated SARMs line for androgen receptor research.
- ■ SOMA — Recovery & Tissue Repair (BPC-157, TB-500)
- ■ AXON — Cognitive & Nootropic (Selank, Semax)
- ■ AURA — Anti-Aging & Longevity (GHK-Cu, Epithalon)
- ■ REGENERIS — Immune & Anti-Inflammatory (KPV, Thymosin Alpha-1)
- ■ APEX — Performance & Metabolic (CJC-1295 / Ipamorelin, Retatrutide)
Testing Standards
- ≥98% HPLC purity on all compounds, verified by independent lab
- ESI-MS identity confirmation on every batch — no substitutions
- ISO/IEC 17025 accredited external laboratory — not in-house testing
- Lyophilized under controlled conditions for maximum shelf stability
- Batch-traceable COA — one document per lot number, not shared across orders
Research Use Only
All products sold by Rainbow Peptide are strictly for in vitro and laboratory research purposes. We do not sell to anyone intending to use these compounds for human consumption or therapeutic purposes. Purchases require age verification (18+) and agreement to our Research Use Only terms.
New to research peptides? Start with our peptide reconstitution calculator or read What Are Research Peptides?
Read our full RUO Disclaimer →