Alternatives to RETA UK in the UK: sellers you can verify

RETA UK (reta-uk.com) does not publish a certificate of analysis that can be verified in its own name, so if you want a UK research-peptide seller whose testing you can check yourself, the verified alternatives are below. The Peptide Watch takes no vendor money and links to no seller's shop.

RETA UK rETA UK publishes a page of Janoshik certificates for its GLP-1 range and invites you to verify them at janoshik.com/verify. We did: one example (Tirzepatide 30mg, batch EGB-0526-TR30, task #148589) is a genuine Janoshik report that verifies on Janoshik's own server. But the client named on every certificate is 'EGB', and every batch code begins 'EGB-', so these are the wholesale supplier's blind-test certificates, not RETA UK's own. A genuine supplier certificate proves the supplier submitted a good vial once; it does not prove the stock this reseller ships you is the same. Add the placeholder registered name 'TEST TRADER LTD' (Companies House 17202698) and unusually low pricing, and this is a dropshipper of EGB stock, not an own-name tested seller.

UK sellers with a verifiable own-name Janoshik certificate (28)

1. Lab77Peptides lab77peptides.co.uk · own-name Janoshik COA Jun 2026
2. Peptology Labs peptologylabs.uk · own-name Janoshik COA Jun 2026
3. Biohacklondon biohacklondon.com · own-name Janoshik COA Jun 2026
4. Velonix Labs velonixlabs.co.uk · own-name Janoshik COA Jun 2026
5. Peptide Biosciences peptide-biosciences.com · own-name Janoshik COA Jun 2026
6. Peptifyuk peptifyuk.com · own-name Janoshik COA May 2026
7. Biohackpeptides biohackpeptides.co.uk · own-name Janoshik COA May 2026
8. Peptideprime peptideprime.co.uk · own-name Janoshik COA May 2026
9. Momentumpeptides momentumpeptides.com · own-name Janoshik COA May 2026
10. Peptidesresearch peptidesresearch.uk · own-name Janoshik COA May 2026
11. Reta24 reta24.co.uk · own-name Janoshik COA May 2026
12. Intel Peptides intelpeptides.com · own-name Janoshik COA May 2026
13. Phoenixbiolabs phoenixbiolabs.net · own-name Janoshik COA Apr 2026
14. Bodylab Store bodylabstore.co.uk · own-name Janoshik COA Apr 2026
15. Unionbiolabs unionbiolabs.com · own-name Janoshik COA Apr 2026
16. Ck Peptides ck-peptides.com · own-name Janoshik COA Mar 2026
17. Xlpeptides xlpeptides.com · own-name Janoshik COA Mar 2026
18. Ascendpeptidesuk ascendpeptidesuk.com · own-name Janoshik COA Mar 2026
19. Regenix Peptides regenix-peptides.co.uk · own-name Janoshik COA Mar 2026
20. Wolverinepeptides wolverinepeptides.co.uk · own-name Janoshik COA Feb 2026
21. Tested Peptides testedpeptides.co.uk · own-name Janoshik COA Jan 2026
22. Alluvi Health Care buyalluvi.co.uk · own-name Janoshik COA Oct 2025
23. Thoroughbredlabs thoroughbredlabs.co.uk · own-name Janoshik COA Sep 2025
24. Britpeptides britpeptides.co.uk · own-name Janoshik COA Sep 2025
25. BuyRetatrutide buyretatrutide.net · own-name Janoshik COA Sep 2025
26. Kensingtonlabs kensingtonlabs.co.uk · own-name Janoshik COA Jul 2025
27. Imperialpeptides imperialpeptides.co.uk · own-name Janoshik COA 2025-2026
28. Simplypeptides simplypeptides.co.uk · own-name Janoshik COA various

See the full RETA UK audit, the independently-tested list, or check any shop with the free COA Checker.