A peptide COA (Certificate of Analysis) is the independent lab report that verifies a compound’s purity and identity — the paperwork that separates a legitimate research peptide from a guess. Every batch we stock is third-party tested at ≥98% purity before it reaches you, no exceptions. Browse the full, up-to-date library of peptide CoAs on our Certificates of Analysis page, searchable by batch number. If you can’t find the one you need, contact us and we’ll send it over directly.