Janoshik testing, read.
Janoshik Analytical is an independent lab in the Czech Republic that the research-peptide market uses for HPLC purity and mass-spec identity reports. Every report resolves to a record at verify.janoshik.com, on Janoshik's own servers, not the vendor's. The figures below come from our snapshot of its public-tests listing taken on 30 June 2026 and are not updated live.
Janoshik in four answers.
CHECKED 15 OCT 2026Distribution snapshot
70 COMPOUNDS · 6 REGIONSWhat people ask about Janoshik
FAQIs Janoshik testing legit?
Yes, as a lab. Janoshik Analytical is an independent company, and every report resolves to a record at verify.janoshik.com on Janoshik's own servers, not on the vendor's site, which is why a fabricated certificate fails against it. The public listing also carries failures: in our 30 June 2026 snapshot of 337 readable reports (662 indexed), 5 have a flagged identity result and 2 an explicit fail. Note the listing's own disclaimer: Janoshik does not endorse or have any affiliation with the companies listed. The full answer, with the caveats, is in is Janoshik legit.
Where is Janoshik located?
In the Czech Republic, in the European Union. Janoshik's shipping overview gives the laboratory's location as the Czech Republic, postal code 252 10, and notes that packages from outside the EU go through Czech import customs. The public-tests listing is at public.janoshik.com; per-test records are at verify.janoshik.com.
How much does Janoshik testing cost?
Pricing is set per assay on Janoshik's site and varies by test type. On 15 October 2026 the common GLP-1 blind test (semaglutide, tirzepatide and retatrutide) was listed at $360. Other services include HPLC purity, LCMS identity, and full vial assessment with optional sterility and endotoxin add-ons. Vendors and buyers order from the same price list; check janoshik.com for current rates.
Where can I see Janoshik public test results?
At public.janoshik.com, Janoshik's own listing of the reports its clients chose to make public. Each entry opens its record at verify.janoshik.com, which is how you verify a Janoshik report you were sent. Our snapshot of that listing, taken on 30 June 2026, holds 337 readable reports. The figures on this page come from it and are not updated live.
Does Janoshik test tirzepatide and retatrutide?
Yes. Across our 337-report snapshot, retatrutide and tirzepatide are the two most-tested compounds: 68 retatrutide reports and 48 tirzepatide reports as of June 2026. The report-by-report breakdown is in Janoshik tirzepatide and retatrutide results.
How do I verify a Janoshik COA?
Enter the test ID or scan the QR code at verify.janoshik.com. Match three fields exactly between the certificate and the record: compound identity, purity percentage, and sample date. Then confirm the batch ID on the vial in your hand matches the batch ID on the COA. The full protocol, including how to spot fabricated certificates, is in our guide to verify a Janoshik COA.
Janoshik vs Finnrick: what's the difference?
Both are third-party peptide testing labs. Janoshik publishes a QR-verified public-tests database where every certificate resolves to a record on Janoshik's servers. Finnrick publishes a larger overall test count. We set the two side by side, with Kovera, in peptide testing labs compared.