About Onyx Peptides
Onyx Peptides is a European supplier of research-grade peptides, operated by Vexio j. s. a., a company registered in Slovakia. We supply laboratories, universities and independent researchers across the European Union with high-purity compounds backed by independent third-party analysis.
What we supply
Our catalog covers the peptide families most often requested in preclinical and in-vitro work: tissue repair and regeneration compounds, cognitive and neuro-research peptides, growth-hormone secretagogues, metabolic research compounds, cosmetic and skin-biology peptides, and longevity research compounds. Each listing includes the sequence background, molecular data, documented research areas and published literature references, so you can confirm a compound is the right fit before ordering.
Quality and testing
Every batch we stock is analysed by Janoshik Analytical, an independent third-party laboratory, using high-performance liquid chromatography (HPLC) for purity and mass spectrometry for identity confirmation. Testing also covers endotoxin and heavy-metal screening.
We maintain an average purity above 99% across the catalog, and we do not list any product that falls below 98%. A batch-matched Certificate of Analysis is available on request for any lot we ship — simply contact us with your order number and we will send the COA for your specific batch.
Independent verification
Purity and identity are confirmed by an external laboratory, not by in-house claims. HPLC chromatograms and mass-spec data are what determine whether a batch is listed at all.
COA on request
Every lot has a batch-specific Certificate of Analysis covering purity, identity, endotoxins and heavy metals. Request it before or after purchase and we will send the document for your exact batch.
EU-based operations
We hold stock and dispatch from within the European Union. That means no customs delays for EU customers, short transit times, and orders that stay inside the EU regulatory framework.
Same-day dispatch
Orders placed before 16:00 CET on a business day are dispatched the same day. Every shipment is tracked end to end, and lyophilised vials are packed with protective padding to survive transit.
Storage, handling and shipping
Products are supplied as lyophilised (freeze-dried) powder, which is stable at room temperature and does not require cold-chain transport. We ship with Packeta, offering pick-up points and home delivery in Slovakia and Czechia, and courier delivery across the rest of the European Union. Shipping is free on orders over €100. Once you reconstitute a vial with bacteriostatic water, it should be refrigerated at 2–8°C and used within roughly 30 days — our peptide calculator covers the reconstitution maths.
Ordering and payment
We accept cryptocurrency, SEPA bank transfer and cash on delivery for Packeta shipments. A VAT-compliant invoice is issued for every order and sent by email. Slovak customers receive their invoice and order emails in Slovak; all other customers receive them in English. Quantity discounts apply automatically from three units of the same product.
Research use only
All products sold by Onyx Peptides are intended strictly for in-vitro research and laboratory use. They are not medicines, food supplements or cosmetics, they are not approved for human or veterinary use, and they are not intended for human or animal consumption. Purchasers must be at least 18 years old and are responsible for verifying that possession and use of a given compound is lawful in their own jurisdiction. Nothing on this website constitutes medical advice or a therapeutic claim.
Legal entity
Vexio j. s. a.
Trading as Onyx Peptides
Registered office: Horná 3829/87, 974 01 Banská Bystrica, Slovakia
IČO: 54214530
DIČ: 2121598853
Email: support@onyxpeptides.com
Questions about a compound, a batch or an order? Contact us — or read the FAQ for purity, storage and shipping details.