A Certificate of Analysis (CoA) is an official lab document that verifies your peptide’s quality. The key sections to review are:
- Purity (should be 99%+);
- Identity (confirms correct peptide via mass spec);
- Appearance (should match product description); and
- Endotoxin levels (should be below 1 EU/mg).
Each CoA is batch-specific and is available on product pages.