Analytical Methods
HPLC, mass spectrometry and certificates of analysis.
September 29, 2026
How to Read Peptide Research: Purity, Identity and Levels of Evidence
A short methods guide to certificates of analysis, HPLC purity, mass-spectrometry identity and the difference between cell, animal and human evidence.
Read article →This article summarizes published third-party scientific literature — much of it conducted in cultured cells or animal models. It is not medical advice, not a therapeutic or performance claim, and not a usage guide. Peptide Purity USA products are sold strictly for in vitro laboratory research and are not for human or veterinary use. Read our content disclosures.