Is United Peptides legit? An independent review
United 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
- unitedpeptides.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
United Peptides checked 13 October 2026: unitedpeptides.co.uk is a live UK-facing storefront (GBP, free UK delivery) listing four products: retatrutide 20 and 40mg, tirzepatide 60mg and semaglutide 5mg, some out of stock. The domain was registered on 9 June 2026. The site names 'United Peptides Ltd'; a Companies House search on 13 October 2026 found no company of that exact name. The homepage says 'Every batch is analysed by an independent laboratory. Certificates of Analysis are published against batch numbers'; the About page says they are available on request by email. No laboratory is named and no certificate is published.
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 United Peptides
Is United Peptides legit?
United Peptides (unitedpeptides.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 United Peptides publish a real, verifiable Certificate of Analysis?
Not one that can be independently verified in its own name. United Peptides (unitedpeptides.co.uk) says every batch is analysed by an independent laboratory, but its About page says certificates are available 'on request by email', and no laboratory is named.
How do I check United Peptides's certificate myself?
Find the certificate on unitedpeptides.co.uk and read four things: an independent laboratory is named; the client field names United 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.