Is PepSource legit? An independent review
PepSource is on the watch list: its certificate can't be verified in its own name, one of 480 of 521 UK sellers that fail this check.
- Certificate
- Freedom Diagnostics Testing report, not verifiable in its own name
- Official website
- pepsource.co.uk
- Reviews
- Trustpilot 4.3 from 10 reviews
- Orders reported
- none yet · tell us about yours
Checked daily against the seller's site, the laboratory's site and the public record. Method · data · correction
What we found
PepSource publishes batch pages that name Freedom Diagnostics Testing, a US laboratory, not Janoshik, with a task number and a lookup code, but it shows only its own summary of each result; the full signed certificate is 'available on request'. Checked 17 September 2026: the domain was registered on 1 July 2026 and PepSource Ltd (Companies House 17345932) was incorporated on 17 July 2026 at 20 Wenlock Road, London N1, a registered-office service address. Some batch pages predate the shop: its BPC-157 batch AS250910 is dated 12 September 2025 and its glutathione batch 17 September 2025, and batch codes come in several formats (AS250910, CU50-2605-03-IV, MS10-2605-03-IV, XA10-2606-02-IV). It sells vials, nasal sprays and injection pens, including GHK-Cu, MOTS-c, retatrutide, selank and semax; support is via WhatsApp. What would move this listing: a Janoshik report, verifiable on the laboratory's site, that names PepSource as the client.
New As of 13 October 2026 you can leave feedback on your order. It shows the next morning, once you have confirmed your email; written notes appear after we have read them.
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Questions people ask about PepSource
Is PepSource legit?
PepSource (pepsource.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 PepSource publish a real, verifiable Certificate of Analysis?
Not one that can be independently verified in its own name. ⚠ Tested by a US lab, not Janoshik, and the certificate itself is on request.
How do I check PepSource's certificate myself?
Find the certificate on pepsource.co.uk and read four things: an independent laboratory is named; the client field names PepSource, 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.