🚩 On the watch list, its certificate can't be verified in its own name.
Peptidesupplyuk states its peptides are 'third-party tested' / 'lab tested' to ≥99% but never names the lab and publishes no verifiable certificate. A purity claim with no lab, no document and no verification link is just a number on a product page, the buyer is asked to take quality entirely on trust. Aggravating: pushes GLP-1 'pens'/weight-loss framing; barely a functioning shop.
What doesn't add up on its site
Quoted straight from peptidesupplyuk.co.uk, and why it falls apart.
“…About PeptideSupplyUK Pioneering quality and trust in the UK peptide research supply industry since 2019 Our Story PeptideSupplyUK was founded with a simple mission: to provide UK researchers with ac…”
Claims to be trusted since 2019, but its own domain wasn't registered until January 2026, years later. A business cannot have a reputation older than its website. The track record is invented.
Pricing vs the market, benchmarked on BPC-157
The Peptide Watch benchmarks every vendor on the same compound, BPC-157, the most common research peptide, as £ per milligram, so prices are directly comparable across all providers. No public BPC-157 price feed was available for this vendor at audit.
The audit checklist
Check
Result
Verifiable certificate in its own name
No
Independent lab named
None named / unverifiable
Tests its own stock
No evidence
Claims that don't add up
1 found
The bottom line. Peptidesupplyuk sits on the watch list because it does not publish a certificate that can be verified in its own name. Everything above is observable on its own website and the public record. See the vendors whose certificates are actually their own →
⚠️ Is anything on this page wrong or out of date? Submit a correction request and we'll look into it, vendors welcome too.