Onyx Peptides is a European supplier of research-grade peptides, operated by Vexio j. s. a.. We provide the global research community with high-purity compounds backed by transparent, third-party testing.
We believe researchers deserve access to premium-quality peptides without the markup of legacy suppliers. Every product we sell is independently tested, and every Certificate of Analysis is published openly — because transparency shouldn't be optional.
We maintain an average purity above 99% across our entire catalog. Every batch is verified by independent HPLC and mass spectrometry analysis before it reaches our warehouse.
Every product ships with a batch-matched Certificate of Analysis. We publish all COAs openly — you can verify the purity of your exact lot number before and after purchase.
We dispatch from within the European Union, ensuring fast delivery (1–3 days for EU customers), proper cold-chain handling, and compliance with EU import and quality regulations.
Orders placed before 16:00 CET ship the same business day. We use DHL and PostNL with full tracking on every shipment, packed in temperature-controlled mailers.
Onyx Peptides was founded because we saw a gap: too many peptide suppliers cut corners on purity, hide behind vague "in-house testing" claims, or charge inflated prices. We set out to build the supplier we wished existed — one that treats researchers as partners, not transactions.
Vexio j. s. a.
Trading as Onyx Peptides
Email: hello@onyxpeptides.com
