Products that display a COA icon on our website have been independently tested by Janoshik Analytical, a respected third-party laboratory. The testing is arranged by our fulfillment partners, and results are published on our website. Products without a COA icon are tested by the manufacturer in their own labs. If a product doesn't have a COA, we highly recommend testing it yourself -- you can submit samples directly at janoshik.com/c/peptides.
Are your peptides third-party tested?
Last updated on Feb 04, 2026