Our Certificates of Analysis (COAs)

At PROYU Peptides, transparency and quality assurance are at the core of everything we do. Our Certificates of Analysis (COAs) provide detailed, verifiable proof of the purity, concentration, and identity of every peptide batch we offer. To ensure complete, uncompromised quality, all of our products undergo rigorous analysis by independent, accredited laboratories—and we actively welcome third-party testing from our customers. Furthermore, we continuously update our website with fresh COAs as new batches arrive, so you can always review the exact lab results for the product you receive with absolute confidence.