Frequently Asked Questions

All products sold by Onyx Peptides are intended strictly for in-vitro research and laboratory use only. They are not drugs, food supplements, or cosmetics, and are not intended for human or animal consumption.

Yes — a batch-matched Certificate of Analysis (COA) from an independent third-party laboratory is available on request. COAs include HPLC purity data, mass spectrometry confirmation, and endotoxin testing results.

We maintain an average purity above 99% across our catalog. The exact purity for each batch is documented on the COA. We do not sell any product that falls below 98% purity.

Lyophilized (unreconstituted) peptides can be stored at room temperature (15–25°C) away from direct light. Once reconstituted with bacteriostatic water, store at 2–8°C and use within 30 days.

Orders placed before 16:00 CET on business days are dispatched the same day. EU delivery typically takes 1–3 business days. All shipments include full tracking via DHL or PostNL.

Yes — free shipping on all EU orders over €100. UK orders over €150 and rest-of-Europe orders over €200 also qualify.

We accept Visa, Mastercard, PayPal, Apple Pay, Klarna, and iDEAL. All payments are processed securely through encrypted payment gateways.

Due to the nature of research chemicals, we cannot accept returns on opened products. We offer full refunds or replacements for damaged, defective, or incorrect items. Contact us within 14 days. See our Shipping & Returns page for details.

We ship to all EU countries, the United Kingdom, and most other European countries. It is the buyer's responsibility to verify compliance with local regulations.

Add bacteriostatic water slowly to the lyophilized vial. Gently swirl until dissolved. Use our Peptide Calculator to determine the exact volume for your desired dose.

Yes! Visit our Affiliate Program page to learn more and apply.

Email us at support@onyxpeptides.com. Mon–Fri, 9:00–17:00 CET.