Alternatives to PepSource in the UK: sellers you can actually verify
PepSource (pepsource.co.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 PepSource 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 PepSource
Unlike PepSource, each seller below has been checked to publish a report you can verify on the testing laboratory's own website. Sellers whose verified certificates cover what PepSource sells are listed first; the full ranked list of 38 is linked underneath.
- Lab77Peptides lab77peptides.uk · own-name Janoshik COA including BPC-157, Sep 2026
- Kensingtonlabs kensingtonlabs.co.uk · own-name Janoshik COA including BPC-157, May 2026
- Xlpeptides xlpeptides.com · own-name Janoshik COA including BPC-157, Apr 2026
- Clinicore clinicore.co.uk · own-name Janoshik COA including BPC-157, Feb 2026
- Pureline Biolabs purelinebiolabs.co.uk · own-name Janoshik COA including GHK-Cu, Sep 2026
- Thoroughbredlabs thoroughbredlabs.co.uk · own-name Janoshik COA including BPC-157, Sep 2026
Full ranked list: the 38 independently-tested UK vendors. Read the complete PepSource audit, or check any shop with the free COA Checker.