Free shipping for orders over $500 to United States

Quality & testing

How research peptides are verified for identity and purity — and how to read the documentation yourself.

Aerial view of braided river channels threading an alpine meadow

How to read a peptide Certificate of Analysis (COA)

What HPLC purity, mass-spec identity, and net peptide content actually mean, and how to sanity-check a COA before you buy.

July 9, 2026

This site is intended for qualified researchers. By continuing you confirm that you are 21 or over and that you are acquiring these compounds for laboratory research use only, not for human consumption. Full declaration.

Leave

How to read a peptide Certificate of Analysis (COA)

New research summaries, by email