Is Optimal Lab legit? An independent review
Optimal Lab is on the watch list: its certificate can't be verified in its own name, one of 483 of 524 UK sellers that fail this check.
- Certificate
- none found in its own name
- Official website
- optimallab.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
Optimal Lab names Janoshik, but only as 'our supplier Janoshik', its supplier's testing, not a certificate commissioned in Optimal Lab's own name, and per-lot certificates are 'available on request' rather than published. No purity figures and no company registration are shown, so nothing about its stock can be independently verified. Newport, South Wales; sells BPC-157, TB-500, retatrutide and NAD+ with UK Royal Mail Tracked 24 dispatch.
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 Optimal Lab
Is Optimal Lab legit?
Optimal Lab (optimallab.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 Optimal Lab publish a real, verifiable Certificate of Analysis?
Not one that can be independently verified in its own name. Optimal Lab names Janoshik only as its supplier's testing, not a certificate commissioned in its own name, and offers per-lot certificates 'on request' rather than published, so there is nothing you can independently verify.
How do I check Optimal Lab's certificate myself?
Find the certificate on optimallab.co.uk and read four things: an independent laboratory is named; the client field names Optimal 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.