Buy Research-Grade Koi Peptides, in stock.
FAQs
Why choose Koi?
≥99% purity target — the exact value for your lot is stated on that lot’s COA. HPLC-verified, LC-MS confirmed, lyophilized in the US under controlled conditions | Independent labs run the tests. The COA is dated to your batch and published on the product page before the order ships | Free shipping over $200. Same-day dispatch on orders placed before 2 PM CT, Monday through Friday.
What are research peptides?
Research peptides are short amino-acid chains supplied for laboratory and in-vitro study only not for human or animal use. Koi synthesizes research-grade peptides in the US and verifies every lot for purity and identity. Browse all research peptides for sale in our catalog.
Who can buy peptides for sale from Koi Peptides?
Our peptides for sale are available to researchers, laboratories, and qualified institutions for research use only (RUO) — not as drugs, supplements, or for human consumption. See our contact us for ordering details.
What purity are your research peptides, and how is it verified?
Every Koi peptide is released against a ≥99% HPLC purity criterion. Each lot is tested in-house and re-run by an independent ISO/IEC 17025 lab, with each lot’s COA published on its product page.
How should I store lyophilized peptides?
Lyophilized (freeze-dried) peptides are stable at room temperature for short-term handling; for long-term storage keep them at −20 °C, away from light, and avoid repeated freeze–thaw cycles. Reconstituted peptide should be refrigerated and used within the window noted on its COA.
How fast do you ship, and where from?
We offer same-day fulfillment from our US warehouses on orders placed before 2 PM Central, with free shipping over $200. Tracking is included on every order.
Is it legal to buy research peptides?
Yes — research peptides can be purchased in the US for laboratory research use only. They are sold as research reagents, not as drugs or supplements, and are not approved for human or veterinary use.
Why buy research peptides from Koi Peptides?
Koi synthesizes and lyophilizes peptides in the US, tests every lot in-house, re-runs it at an independent ISO/IEC 17025 lab, and publishes a COA you can match by lot ID.
Do you sell peptide blends?
Yes — alongside single peptides, we offer research blends like KLOW and BPC-157/TB-500 (Wolverine). Browse all peptide blends in the catalog.