Buy Research Peptides in the EU
Onyx Peptides supplies research peptides to laboratories across the European Union. We are operated by Vexio j. s. a., a company registered in Slovakia (IČO 54214530), and every order ships from inside the EU — so there is no customs entry, no import duty and no border hold. Orders placed before 16:00 CET are dispatched the same day, and shipping is free above €100.
What you are actually buying
Every compound is supplied as lyophilised powder in a sealed vial, strictly for in-vitro laboratory research. Nothing here is a medicine: none of it is approved for human or veterinary use, and none of it is intended for consumption. The vial carries the compound name, the quantity as gross lyophilisate, and a batch number that ties it to its analysis.
Worth knowing before you compare prices: a vial labelled 5 mg does not contain 5 mg of peptide. It contains 5 mg of lyophilisate, of which the peptide is typically 75 to 90 per cent — the rest is counter-ions and residual water. Our note on peptide content versus purity works through the arithmetic.
How to check quality before you order
Ask for the Certificate of Analysis of the batch currently in stock. Not a sample certificate, not last year’s — the batch you would actually receive. A supplier who tests every batch has the document already and can send it in minutes.
Each of our batches is analysed by Janoshik Analytical, an independent laboratory in Prague, covering HPLC purity, mass-spectrometric identity, endotoxins and heavy metals. The laboratory is named on the certificate and will confirm a report it issued if you contact them with its identifier. That is what makes the document mean something — a purity figure with no named laboratory behind it is a claim, not evidence.
Catalogue and ordering
The catalogue is deliberately small: 19 compounds we can test properly and keep in stock, rather than several hundred drop-shipped on demand. Browse the full range in the shop, or start with tissue repair, metabolic research or cognitive research.
We accept SEPA bank transfer, card payment, crypto and cash on delivery. If you are comparing suppliers, our nine-point checklist sets out what to verify before spending anything, and the guide to requesting a certificate includes a ready-made email template.
All products are supplied strictly for laboratory research. Not for human consumption, veterinary or clinical use.