How do I know if a peptide vendor is legit?

Look for a test report (certificate of analysis) that names an independent lab and a batch or lot number. Then check that it matches a real lab report and is not just a generic PDF. Our lab profiles track 21 testing labs and what each one shares, including whether it has a public website where you can check a report by code. A seller that only says 'third party tested' without naming who tested it is making a claim, not showing 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.