Non-negotiables
- A certificate of analysis matched to the lot number on your vial, not a generic sample
- Testing performed by an independent laboratory, named on the certificate
- Both purity (HPLC) and identity (MS) reported, not purity alone
- Cold-chain packaging with insulation and gel packs as standard
- A named UK company with a registered address and reachable technical support
Red flags
- Dosing advice, before-and-after imagery or any suggestion of human use
- Certificates with no lot number, no laboratory name or an unreadable chromatogram
- Prices far below the market with no explanation of the synthesis route
- No physical address, no company number and support only via social media DMs
- Refusal to send the raw chromatogram when asked
Questions worth asking
- Which laboratory performed the analysis, and can I see the raw data?
- What is the net peptide content, and which salt form is it supplied in?
- How is the material stored between goods-in and dispatch?
- What happens if my lot fails my own incoming quality check?
How we answer them
Independent laboratory, raw chromatograms on request, salt form and net peptide content on the certificate, -20°C storage until pick and pack, and a full refund or replacement if your incoming check disagrees with our documentation.