Peptide COA verification checklist
PurePeptideHub · 14 October 2026

Check the issuer, sample, batch and limits of a laboratory report.

[ ] Find the issuing laboratory through its official website. Open its verification service or contact it directly; do not rely on a seller's screenshot.

[ ] Compare the report ID, version, dates, sample description and results with the issuer's complete record. A failed lookup alone does not prove a forgery.

[ ] Match the sample and lot to your material. If identifiers differ, request a documented link rather than assuming the report covers your vial.

[ ] Separate identity, chromatographic purity, measured amount, sterility and endotoxin. An omitted result is missing information, not a pass.

[ ] Read the method, units and reporting limits beside each result. Peak-area purity is not automatically the peptide's percentage by weight or amount per vial.

[ ] Check any accreditation claim against the current accreditation-body record and the exact method scope.

[ ] Record what remains unresolved and ask the issuer specific questions. A genuine report does not establish clinical safety or every vial's contents.

Sources and further reading
Full sourced COA guide: https://purepeptidehub.com/resources/understanding-coas
MZ Biolabs: what purity testing does not measure: https://www.mzbiolabs.com/mzbiolabs/coa-testing/

Educational information only. This checklist does not establish clinical safety or recommend a medicine, dose or treatment.