Is Leo Lab legit? An independent review
Leo Lab is on the watch list: its certificate can't be verified in its own name, one of 484 of 524 UK sellers that fail this check.
- Certificate
- none found in its own name
- Official website
- tirzepatide.uk
- Same operator
- leolab.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
Leo Lab tirzepatide.uk trades under the brand 'Leo Lab' (a separate domain, leolab.uk, is linked from third-party UK peptide directories but did not resolve, DNS failure, when checked on 3 September 2026, so tirzepatide.uk is treated as the live storefront). No company name or Companies House registration is disclosed on-site, and no exact 'Leo Lab' match was found on Companies House. The site claims independent third-party lab testing for purity, identity and consistency but names no laboratory and shows no certificate. Stays on the watch list; worth rechecking leolab.uk directly in case it returns.
"Shopping around" between these names is buying from one seller, same stock, same risk, different branding.
New As of 13 October 2026 you can leave feedback on your order. Reports are being collected now and will be shown on this page from 1 November 2026, so every seller has the same time to gather them. Written notes appear only after we have read them.
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Questions people ask about Leo Lab
Is Leo Lab legit?
Leo Lab (tirzepatide.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 Leo Lab publish a real, verifiable Certificate of Analysis?
Not one that can be independently verified in its own name. Trading as 'Leo Lab', it claims 'independent third-party laboratory testing to verify purity, identity and consistency' but never names the laboratory or publishes a checkable certificate. Its bare-domain storefront leolab.uk did not resolve when checked; tirzepatide.uk is the live site.
How do I check Leo Lab's certificate myself?
Find the certificate on tirzepatide.uk and read four things: an independent laboratory is named; the client field names Leo Lab, 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.