How to Read a Peptide COA
A field-by-field guide to reading a peptide certificate of analysis: identity, purity, mass, net content, impurities, methods, and what a verdict actually means.
· 5 min read
ARTICLES
Peptide testing, explained
What the methods actually measure, what a COA can and can't prove, and how the trust mechanics work. No hype, no medical claims.
HPLC Purity vs. Mass-Spec Identity: Why You Need Both
Purity and identity answer different questions about a peptide. Here's how HPLC and LC-MS work at a high level, and why one test without the other leaves a gap.
· 4 min read
What Peptide Testing Can and Can't Tell You
A COA describes one tested sample by defined methods — not sterility, safety, legality, or every vial in a batch. An honest look at what testing can't establish.
· 4 min read
Why Blind Samples and Chain of Custody Matter
Supplier-run testing can be gamed through cherry-picked samples and lab relationships. Blind IDs, neutral intake, custody trails, and published fails are the fix.
· 4 min read