Janoshik Analytical
Czech laboratory (Janoshik s.r.o., Prague) and one of the most widely cited testing labs in the research-peptide market. Reports carry a key that can be checked on the laboratory's own verification page; on 2026-10-22 a real key returned the report and an invented key returned an empty page. The lab-hosted reports we read that day give quantity and purity, with no identity method stated. Endotoxin and sterility are available on request, and several vendors publish those expanded reports. No ISO/IEC 17025 accreditation is published. Methods: HPLC purity and quantity; endotoxin & sterility on request.
- Vendors with its COAs
- 15
Vendors with its COAs
- Peptides tested
- 12
Peptides tested
Tier B+
Prague, Czech Republic
Checks run
- BusinessL1 Real business: Pass
- IndependentL2 Independence: Pass
- Verify routeL3 Verification route: Pass
- MethodL4 Identity method: Partial
- Track recordL5 Track record: Pass
- AccreditedL6 Accreditation: Fail
Six published checks, the same for every laboratory. Results and evidence
Verify a Janoshik Analytical certificate yourself
Where the code is, the lookup address, what a genuine result shows, and the control check. We confirmed 159 of 159 certificates naming Janoshik Analytical at the laboratory, from 15 vendors.
About Janoshik Analytical
Janoshik Analytical is an independent analytical lab based in Prague, Czech Republic, rated tier B+ in the Peptide Source Review lab directory. No ISO/IEC 17025 accreditation is published by the laboratory, and none was found in A2LA's public directory lookup (checked 2026-10-21). Certificates from a tier B+ laboratory earn the +2 laboratory points in our lab rubric.
15 US peptide vendors in our audit publish certificates naming Janoshik Analytical, led by Prime Peptides at 7.94/10. The reports cover HPLC purity and quantity; endotoxin & sterility on request.
How we graded Janoshik Analytical
Each check is the same for every laboratory (the rules). Checked 2026-10-22.
| Result | Check | What we found |
|---|---|---|
| Pass | L1 Real business | The Czech commercial register (ARES) lists Janoshik s.r.o., ICO 17668727, Kaprova 42/14, Prague 1, and the terms on janoshik.com name the same company.Evidence for L1 (opens in new tab)janoshik.comchecked |
| Pass | L2 Independence | janoshik.com was registered 2016-02-07, before its earliest report in our records (2023-11-20); 15 unrelated vendor clients; lookup on the lab's own subdomain; no link to a listed vendor found.Evidence for L2 (opens in new tab)rdap.verisign.comchecked |
| Pass | L3 Verification route | On 2026-10-22 verify.janoshik.com returned report 85982 for its real key and an empty page for an invented key.Evidence for L3 (opens in new tab)verify.janoshik.comchecked |
| Partial | L4 Identity method | The two lab-hosted reports we read on 2026-10-22 (85982 BPC-157, 167039 Semax) give quantity and purity only, with no identity method; janoshik.com names no method.Evidence for L4 (opens in new tab)verify.janoshik.comchecked |
| Pass | L5 Track record | Earliest report in our records 2023-11-20; 15 unrelated clients.Evidence for L5 (opens in new tab)verify.janoshik.comchecked |
| Fail | L6 Accreditation | No accreditation is claimed; no entry was found on the Czech accreditation body's site or on the A2LA, PJLA or ANAB registers.Evidence for L6 (opens in new tab)cai.czchecked |
No ISO/IEC 17025 accreditation is published by the laboratory, and none was found in A2LA's public directory lookup (checked 2026-10-21)
Vendors publishing Janoshik Analytical certificates
Peptides tested here
Products whose certificate on a vendor page names Janoshik Analytical. Compare sources for each.
Similar labs
Other tier B+ labs in our directory.
Janoshik Analytical: Frequently Asked Questions
Is Janoshik Analytical accredited?
We have not confirmed ISO/IEC 17025 accreditation for Janoshik Analytical that is active on the accrediting body's register with a scope covering peptide testing (check L6). No ISO/IEC 17025 accreditation is published by the laboratory, and none was found in A2LA's public directory lookup (checked 2026-10-21).
Which peptide vendors use Janoshik Analytical?
15 vendors in our independent audit publish certificates naming Janoshik Analytical: Prime Peptides, Ameano Peptides, Honest Peptide, Verified Peptides, Paramount Peptides, NuuVive Peptides, and 9 more. The full list with scores is on this page.
What does Janoshik Analytical test for?
Janoshik Analytical performs HPLC purity and quantity; endotoxin & sterility on request on research-peptide samples.