Alternatives to Leo Lab in the UK: sellers you can actually verify
Leo Lab (tirzepatide.uk) is on The Peptide Watch's watch list. What its certificate shows, and why it cannot be verified in its own name, is set out in the Leo Lab audit. This page answers the other half of the question: which UK sellers do publish a certificate you can check yourself before you buy. The Peptide Watch takes no vendor money and links to no seller's shop.
Verified alternatives to Leo Lab
Unlike Leo Lab, each seller below has been checked to name the exact independent laboratory (Janoshik) and let you look the report up yourself. Sellers whose verified certificates cover what Leo Lab sells are listed first; the full ranked list of 39 is linked underneath.
- Lab77Peptides lab77peptides.uk · own-name Janoshik COA including Tirzepatide, Oct 2026
- Biovanta biovanta.store · own-name Janoshik COA including Tirzepatide, Sep 2026
- BioVanta Research biovantaresearch.com · own-name Janoshik COA including Tirzepatide, May 2026
- Velonix Labs velonixlabs.co.uk · own-name Janoshik COA Jun 2026
- Liverpool Advanced Biosciences (LAB.LTD) lab.ltd · own-name Janoshik COA Jun 2026
- Kingston Peptides kingstonpeptides.com · own-name Janoshik COA Jun 2026
Full ranked list: the 39 independently-tested UK vendors. Read the complete Leo Lab audit, or check any shop with the free COA Checker.