✅ Independently tested, its certificate is genuinely its own and verifiable.
Peptifyuk publishes its own Janoshik certificate of analysis, naming Peptifyuk as the client, with its most recent certificate dated May 2026. Because Janoshik reports carry a unique code checkable on janoshik.com, the result can be independently verified.
The certificate
✅ Its certificate is its own. Peptifyuk publishes its own Janoshik certificate of analysis, naming Peptifyuk as the client, with its most recent certificate dated May 2026. Because Janoshik reports carry a unique code checkable on janoshik.com, the result can be independently verified.
Pricing vs the market, benchmarked on BPC-157
BPC-157
£2.7/mg (≈ £27 for a 10 mg vial)
Versus market median (£3.0/mg)
0.9×, competitive
In line with the wider UK market. 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.
Google Ads
ℹ️ Note: this seller also runs Google ads for research peptides, a category Google's own policies prohibit, visible in Google's Ads Transparency Centre (UK). Worth knowing, but it doesn't bear on the question that puts it on the independently-tested list: its certificates are its own and genuine.
Reviews
4★★★★☆ · 4 reviews on Trustpilot
Read it critically. A Trustpilot score measures whether parcels turn up and support replies, not whether the vial contains what the label says. A vendor can have hundreds of happy delivery reviews and still show you a borrowed or fake certificate; the two are unrelated. Also watch for a burst of near-identical 5-star reviews in a short window, the signature of bought reviews.
🚩 Bank & crypto, bank transfer / crypto only, so if it never ships there is no chargeback to get your money back.
The audit checklist
Check
Result
Verifiable certificate in its own name
Yes, own Janoshik COA
Independent lab named
Janoshik
Tests its own stock
Yes
Pricing vs market
0.9× median (competitive)
Advertising in a banned category
Yes, live Google ads
Customer reviews (Trustpilot)
4★ (4 reviews)
The bottom line. Peptifyuk earns a place on the independently-tested list because it pays an independent lab (Janoshik) to test its own stock in its own name, and lets you verify it. That is the standard.
⚠️ Is anything on this page wrong or out of date? Submit a correction request and we'll look into it, vendors welcome too.