Is Syntech Peptides legit? An independent review
Syntech Peptides 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
- syntechpeptides.com
- 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
SYNTECH PEPTIDES Ltd states every batch goes through HPLC and mass spectrometry with a '≥98% minimum purity guarantee' and a COA per batch, but names no laboratory. The company number shown on the site ('113997061') is nine digits where UK numbers are eight, so treat it as unverified. Domain registered February 2026.
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 Syntech Peptides
Is Syntech Peptides legit?
Syntech Peptides (syntechpeptides.com) 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 Syntech Peptides publish a real, verifiable Certificate of Analysis?
Not one that can be independently verified in its own name. ⚠ HPLC/MS claimed, no lab named. Syntech Peptides guarantees '≥98% purity' and 'COA per batch' but names no laboratory.
How do I check Syntech Peptides's certificate myself?
Find the certificate on syntechpeptides.com and read four things: an independent laboratory is named; the client field names Syntech 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.