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Janoshik Analytical is the EU-based third-party lab the research-peptide market uses for HPLC and mass-spec testing. We mirrored the public database and audited 200 reports. Here's what the data actually shows.
Short answer: yes. Janoshik Analytical is a real third-party lab in the Czech Republic that performs HPLC purity quantification and mass-spec identity confirmation on research-peptide samples. Every test resolves to a verifiable record at verify.janoshik.com, and the QR codes on Janoshik certificates point to records on Janoshik servers — not on the vendor's site. Our audit of 200 publicly-submitted tests confirms the lab process is consistent and the public database is internally coherent.
The longer answer below explains what we mean by "legit," how we tested the claim, and what the public data actually supports.
We mirrored Janoshik's public-tests listing into a local corpus and
extracted the headline fields from every report image — compound,
purity percentage, identity confirmation, test date, batch ID, vendor.
The full pipeline lives at scripts/janoshik/ in the vialaudit repository
and is documented in our
Janoshik COA verification guide.
For this audit we asked four narrow questions:
Across the 200 tests we audited, listing-level metadata (sample,
submitter, manufacturer) matched the report image content in every case
where both were present. Five tests carry an identity-confirmation flag
as false — the public database surfaces these alongside the passing
ones rather than hiding them, which is what an honest lab does. The
methodology language on each report is consistent within test category
(HPLC purity reports use one template, mass-spec identity reports use
another).
The QR codes on Janoshik-issued certificates resolve to specific URLs under verify.janoshik.com. Those URLs are not under vendor control, which is the structural reason a fabricated or edited PDF cannot pass QR verification — the QR resolves to a record at Janoshik's servers and that record either matches the printed certificate or it does not. This is the property our four-step verify guide exploits to catch counterfeits.
The 200 tests cluster into seven test categories:
Within each category, the assays reported are consistent across vendors. A retatrutide blind test always returns identity confirmation plus a purity figure; a vial assessment always returns purity, identity, and sterility figures. There is no evidence of vendor-specific methodology shortcuts in the public corpus.
This is the most important question. A "legit" testing lab is one that publishes failures alongside passes. The 200-test corpus contains:
The fact that failures appear in the public listing — the same listing vendors point buyers to as evidence of clean batches — is the behavioral signal that distinguishes Janoshik from a vendor-owned testing operation. Janoshik publishes the bad results, not just the good ones.
Three caveats that buyers reading Janoshik certificates should hold in mind.
The public database is self-selected. Janoshik tests what is sent to them. Vendors choose which batches to submit publicly. A vendor that fails internal pre-tests can decline to submit those batches — which means the public corpus is biased toward passes. We quantified this bias: median purity across our 200-test mirror is 99.7%, which is the self-selection effect, not a refutation of the industry-level 43% failure figure that includes private and withdrawn submissions.
A QR-verified COA does not certify the vial in your hand. The COA certifies a specific batch. Vendors can publish a real Janoshik certificate from a tested batch and ship vials from a different, untested batch with the same SKU label. The defense is to confirm the batch ID on your specific vial matches the batch ID on the COA. This is the fourth step in our four-step verify protocol.
Cherry-picked certificates are not caught by external verification. Even when the COA verifies cleanly against the public database, a vendor that tested only their cleanest batch is misrepresenting the average. Independent retesting on a separate batch is the only defense against this pattern. Our first-hand audit cycle does this; reading public COAs alone does not.
Janoshik Analytical operates from the Czech Republic in the European Union. The public-tests database lives at public.janoshik.com; per-test verification URLs are at verify.janoshik.com. The EU location matters for the research-peptide market because it places Janoshik outside direct US regulatory pressure on the vendors they test — a structural independence that vendor-internal labs cannot offer.
Pricing is set per assay on Janoshik's site and varies by test type. Common services are HPLC purity quantification, LCMS identity, blind GLP-1 multi-compound tests, and full vial assessment with sterility. Vendors pay for tests they choose to submit; buyers can submit independent samples at the same fee schedule. We don't republish Janoshik's fee schedule here because it changes — check their site directly for current pricing.
Janoshik testing is legitimate as a third-party lab process. The data is real, the methodology is consistent, and failures are published alongside passes. The structural caveat is that the public database shows what vendors choose to publish, not what they choose to hide. Reading a single Janoshik COA is meaningful; relying on the corpus without understanding selection bias is not.
For specific verification steps when checking a single certificate, see how to verify a Janoshik COA in four steps. For the aggregate findings from our local mirror, see what 7,164 Janoshik tests reveal.
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