Peakpeptides is tested by Analytical Formulations Inc (US), using UV/Vis spectrophotometry rather than the HPLC/MS standard, off a yahoo.com address. Weaker method, foreign lab, not Janoshik.
See the full audit. This is the short answer; the full Peakpeptides dossier has the certificate check with a live verification link, the Companies House record, pricing against the market and the complete checklist.
Peakpeptides (peakpeptides.shop) 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. Its Trustpilot score is 4.0 from 23 reviews, which reflects delivery and service, not whether a vial contains what the label says. A good delivery reputation is not the same as a verifiable certificate; the two are unrelated. Until Peakpeptides 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: us lab, weaker method. Being unverifiable is a reason for caution, not proof of fraud.
Not one that can be independently verified in its own name. ❌ Don't trust their 'COA' as equal to Janoshik. Their testing is Analytical Formulations Inc (AFI), a US lab using UV/Vis (not the HPLC/MS standard) with a yahoo.com address.