Is PepSource legit? An independent review
PepSource is on the watch list: its certificate can't be verified in its own name, one of 510 of 549 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
- Buyer reports
- Coming soon, visible from 1 November 2026 · tell us about your order
Checked daily against the seller's site, the laboratory's site and the public record. If this seller publishes new evidence, tell us and it is re-checked. 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 Since 13 October 2026 you can tell us how your order went. Reports go up on this page from 1 November 2026, bad ones as well as good, because UK law doesn't let review sites hide negative reviews. A written note appears only after we have read it.
Tap one to start, about 30 seconds.
How buyer reports work
- Every report is confirmed by email before it counts, and each email address can report on a seller once every 90 days.
- We hold back anything that looks like a seller reviewing itself: an email from the seller's own domain, several reports from the same connection, or a sudden burst in a day. A person checks those before anything shows.
- Tick-box answers are shown only as totals. A written comment appears after a person has read it, exactly as the buyer wrote it: we don't edit comments or hold them back, good or bad, and UK consumer law (the Digital Markets, Competition and Consumers Act 2024) doesn't let review sites hide negative reviews. The only thing we take out is personal details, such as a name, phone number or email address.
- Sellers can reply. If a seller disagrees with what buyers report, it can email [email protected] from its own domain, and we show one response next to the totals, with the date.
- No single thing on this page should decide it. Look at the lab reports, the buyer reports and how you'd pay, together.
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.