Purity & Lab Reports

Who verifies our peptides

Janoshik Analytical, an independent peptide lab in the Czech Republic.

Janoshik Analytical is the reference HPLC laboratory most reputable research-peptide suppliers across the UK, EU and US use to verify their batches. They are an independent third-party lab with no ownership, no commercial interest in any peptide manufacturer, and no skin in the game on what the result says.

Their core service is reversed-phase HPLC for purity quantification, with mass-spectrometry confirmation on most batches. Every certificate they issue carries a unique verification key. The same certificate is also added to their public records portal, where anyone can search by compound name, supplier or task ID and see the full historical record of tests they’ve published, with the raw chromatograms attached.

That public record is the bit that matters: every test they’ve ever issued is checkable by anyone, not just the supplier who paid for it. If the result on the COA in your hand doesn’t match the record on the portal, the COA is fake. That single design choice is what makes Janoshik a credible independent verifier and not just another lab.