How do I read a peptide COA?
A COA is useful only if it proves the exact batch is what the label says it is. Look for identity, purity, net content, endotoxins, sterility, heavy metals, and whether the batch number matches the vial or listing.
The core checks
- Identity: is it the right molecule?
- Purity: how much is target compound vs impurities?
- Net content: how much peptide is actually present?
- Endotoxin and sterility: contamination risk checks.
- Heavy metals: manufacturing contamination check.
- Batch match: does the report match what you received?
Weak COA signs
- No batch number.
- Old report reused across listings.
- Only purity, with no identity or contamination checks.
- Screenshot instead of a real report.
Pepdex rule
A COA is not a magic safety stamp. It is one piece of evidence. The testing scope, lab credibility, and batch match matter.
Pepdex is an educational reference, not medical advice. Peptides vary in legal, approval, and evidence status. This answer is meant to explain the concept, not prescribe a protocol or replace a qualified clinician.
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Last updated 2026-07-07.