Essentialpeptides's 'COA' is the raw-material factory's own QC sheet, the giveaway is the line 'complies with the manufacturer's standard' and a factory lot code. The seller has slapped its logo on the maker's self-assessment. That's the supplier grading itself, twice removed from anything independent, and presented to you as third-party proof. Aggravating: pushes GLP-1 'pens'/weight-loss framing.
See the full audit. This is the short answer; the full Essentialpeptides dossier has the certificate check with a live verification link, the Companies House record, pricing against the market and the complete checklist.
Essentialpeptides (essentialpeptides.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.
You cannot independently verify its testing today. A good delivery reputation is not the same as a verifiable certificate; the two are unrelated. Until Essentialpeptides 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: factory's qc sheet, rebranded. Being unverifiable is a reason for caution, not proof of fraud.
Not one that can be independently verified in its own name. What they show is the Chinese factory's own QC sheet (literally 'complies with the manufacturer's standard'), rebranded with their logo, the maker grading itself, not independent testing.