Is RetaSupplier legit? An independent review
retasupplier.co.uk discloses no company name or registration on-site; no matching Companies House entry was found under 'RetaSupplier' as of 3 September 2026. It advertises GBP pricing and claims HPLC and 'Triple Mass Spectrometry' testing with a COA available on request, but names no laboratory and shows no certificate to check. Stays on the watch list until a named lab, a checkable certificate, and a disclosed company are all present.
Verified facts at a glance
| Fact | What we found | How it was checked |
|---|---|---|
| Certificate | nothing we could verify in this seller's own name, details below | read on the seller's own site |
- A certificate that verifies in this seller's own name on an independent laboratory's website
- Any certificate from a named independent laboratory on the pages we audited
Is RetaSupplier legit? The questions people ask
Is RetaSupplier legit?
RetaSupplier (retasupplier.co.uk) is on The Peptide Watch's watch list. It does not publish a certificate of analysis that can be independently verified in its own name, so its quality claims rest on trust rather than checkable evidence. That is not proof of a scam; it means the evidence does not check out.
Does RetaSupplier publish a real, verifiable Certificate of Analysis?
Not one that can be independently verified in its own name. It claims 'HPLC Tested & Certified Batches' and 'Triple Mass Spectrometry Tested' with a certificate available on request, but never names the testing laboratory and publishes no verifiable report, an unnamed, on-request claim is not evidence.
How do I check RetaSupplier's certificate myself?
Find the certificate on retasupplier.co.uk and read four things: an independent laboratory is named; the client field names RetaSupplier, not a supplier; the compound line names the peptide you are buying, not only a batch code; and the report opens on the laboratory's own website from its task number and key (verify.janoshik.com for Janoshik). Then compare the batch number on the report with the one on your vial. The free COA Checker on this site runs the first three checks on a photo of the certificate.
Related vendors
Compare with independently-tested vendors: Is Lab77Peptides legit? · Is Peptology Labs legit? · Is Biovanta legit?
How every seller is judged: methodology. This audit as data: /data/vendor/retasupplier-co-uk.json, re-checked daily. All 41 sellers whose certificate can be checked: the verified list.