Testing laboratory
Janoshik Analytical
We confirmed this is a real, third-party laboratory that is independent of the vendors whose products it tests. Its certificates count as independent corroboration.
Accreditation
No ISO/IEC 17025 accreditation is publicly documented. Stated as absence-of-evidence: multiple independent industry reviews report it holds none, and we did not query the Czech Accreditation Institute directly. Some vendor sites falsely describe Janoshik as ISO-17025 accredited — that claim is not substantiated.
What it tests
Not covered by a default certificate: Sterility, Endotoxin, Heavy metals. A purity certificate does not establish these.
Reputation & incidents
Widely described as the de-facto most-used third-party tester in the research-peptide community — while explicitly not a pharmaceutical-grade or accredited lab. Legal entity verified in the Czech business register.
Data breach on 2 Feb 2026 with an extortion attempt; the lab posted a security notice and restored service. Reported via forum reproductions of the lab's own notice, not independently confirmed by a security firm or regulator.
Vendors this lab has tested
Recent certificates
| Sample | Vendor | Purity | ||
|---|---|---|---|---|
| Retatrutide 20mg | acdcsource | See report | Blind | View |
| Retatrutide 20mg | peponte-biotech | See report | Blind | View |
| Retatrutide 20mg | verpep-peptides | See report | Blind | View |
| Retatrutide 20mg | pepvor-peptides | See report | Blind | View |
| Retatrutide 20mg | zypep-peptides | See report | Blind | View |
| Retatrutide 20mg | apeptix-biotech | See report | Blind | View |
| Retatrutide 20mg | pepvita-biotech | See report | Blind | View |
| Retatrutide 20mg | peptnex-biotech | See report | Blind | View |
| Retatrutide 20mg | nexpep-biotech | See report | Blind | View |
| Retatrutide 20mg | zenova-biotech | See report | Blind | View |
| Retatrutide 20mg | novapeptide-biotech | See report | Blind | View |
| Retatrutide 20mg | prpeptix | See report | Blind | View |
| Retatrutide 20mg | ascend-bio | See report | Blind | View |
| Retatrutide 20mg | glorypeptide-bio | See report | Blind | View |
| Tirzepatide 20mg | peponte-biotech | See report | Blind | View |
| Tirzepatide 20mg | verpep-peptides | See report | Blind | View |
| Tirzepatide 20mg | pepvor-peptides | See report | Blind | View |
| Tirzepatide 20mg | zypep-peptides | See report | Blind | View |
| Tirzepatide 20mg | apeptix-biotech | See report | Blind | View |
| Tirzepatide 20mg | pepvita-biotech | See report | Blind | View |
Sources
Everything on this page is drawn from public records. Naming a lab is never an endorsement, and an accreditation is only as good as the specific method scope it covers.