Is G11 Peptides legit? An independent review
G11 Peptides is on the watch list: its certificate can't be verified in its own name, one of 496 of 536 UK sellers that fail this check.
- Certificate
- none found in its own name
- Official website
- g11peptides.co.uk
- 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
G11 Peptides checked 20 October 2026: g11peptides.co.uk is a live Shopify storefront, GBP pricing, describing itself as supplying 'high-purity research peptides in the UK for laboratory, analytical and in-vitro research' (5-Amino-1MQ, AOD-9604 and others seen). Product copy claims '≥98% purity and third-party tested' but no laboratory is named anywhere checked, no task number or key is shown, and no verify.janoshik.com link or certificate image appears on the site. No Companies House number found on the pages checked. What would move this listing: a named laboratory with a checkable own-name certificate.
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 only after a person has read it. Bad reports go up as well as good ones: UK consumer law (the Digital Markets, Competition and Consumers Act 2024) doesn't let review sites hide negative reviews. We only trim or hold a comment for dosing or health effects, personal details, names of other shops, or accusations we can't check.
- 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 G11 Peptides
Is G11 Peptides legit?
G11 Peptides (g11peptides.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 G11 Peptides publish a real, verifiable Certificate of Analysis?
Not one that can be independently verified in its own name. G11 Peptides (g11peptides.co.uk) advertises its research peptides as '≥98% purity and third-party tested', but names no specific laboratory and links no verify.janoshik.com report.
How do I check G11 Peptides's certificate myself?
Find the certificate on g11peptides.co.uk and read four things: an independent laboratory is named; the client field names G11 Peptides, 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.