How do I know if a peptide vendor is legit?

Look for a certificate of analysis that names an independent laboratory and a batch or lot number, then check that the certificate actually corresponds to a real lab report rather than a generic PDF. Our lab profiles track 21 testing laboratories and what each one discloses, including whether it has a public portal to verify a report by code. A seller that only says 'third party tested' without naming who tested it is a claim, not evidence.

Educational use only. This database summarizes published research and is not medical advice. Where a dose appears it is a record of what a trial or clinic ran, or what people describe doing, with its source attached. Nothing here is a recommendation for personal use.

Part of buying, vendors, and lab testing. How to evaluate a seller's claims, certificates of analysis, and pricing.