Syntech Peptides 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.
See the full audit. This is the short answer; the full Syntech Peptides dossier has the certificate check with a live verification link, the Companies House record, pricing against the market and the complete checklist.
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.
You cannot independently verify its testing today. A good delivery reputation is not the same as a verifiable certificate; the two are unrelated. Until Syntech Peptides publishes an own-name certificate you can check on an independent lab's website, you are taking its quality on trust.
The Peptide Watch does not assert that. What is observable is the reason it sits on the watch list: no named lab, nothing to verify. Being unverifiable is a reason for caution, not proof of fraud.
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.