Research Library
How to Read a Peptide COA
A certificate is useful only when it can be connected to the exact batch being evaluated.
What to look for
Start with the product name, lot or batch number, report number, test date, laboratory, and analytical methods. Then separate identity, purity, and quantitative content—they answer different questions.
Why it matters
A high HPLC purity percentage does not by itself establish exact content, sterility, endotoxin level, or chain of custody. Look for direct lab verification when available.
Educational material only. A COA is evidence about a tested sample and does not by itself establish regulatory approval or suitability for human use.