Overview
Janoshik Analytical is a Czech Republic-based testing laboratory that has become one of the most widely referenced third-party labs in the research peptide and SARM communities. The lab provides quantitative purity analysis and identity confirmation for peptides, SARMs, and other research compounds.
Janoshik operates independently from peptide manufacturers and retailers — it tests samples submitted by companies and individuals and reports the results. This independence is what makes a Janoshik report more meaningful than a manufacturer's own internal quality control testing, where the entity producing the compound is also the one evaluating it.
Testing Methodology
HPLC (High-Performance Liquid Chromatography)
The primary method for determining peptide purity. HPLC separates the components of a sample and measures the proportion that is the target compound. Results are reported as a percentage. For a deeper explanation of how to interpret HPLC results, see our guide to reading a COA.
Mass Spectrometry (MS)
Used for identity confirmation. The instrument measures the molecular weight of the compound and compares it to the expected value. A match confirms the sample is the correct compound. Common MS techniques for peptide analysis include ESI-MS (Electrospray Ionization) and MALDI-TOF.
Endotoxin Testing (LAL)
The Limulus Amebocyte Lysate (LAL) test detects bacterial endotoxins. This is particularly relevant for injectable peptides. Results are reported in EU/mg (Endotoxin Units per milligram). Not all Janoshik reports include endotoxin testing — it depends on what the submitter requests.
How Testing Works
The process for getting a sample tested through Janoshik is straightforward:
Sample submission. The company or individual ships a sample of the product to the lab. The lab does not know or control what is sent — it tests whatever arrives.
Analysis. The lab runs the requested tests (HPLC, MS, endotoxin, etc.) and records the results.
Report issued. A report is generated with a unique reference number. This report is what suppliers publish as their COA, or register on certificate tracking platforms like Certivos.
Verifying a Janoshik Report
Janoshik assigns a unique verification key to each report. You can verify any Janoshik report directly on their website at janoshik.com/verify by entering the key printed on the report. This is the fastest and most reliable way to confirm a report is genuine and has not been altered.
Some suppliers also register their Janoshik results on public certificate platforms, which adds an additional layer of traceability. For example, you can see Janoshik-tested products tracked through Certivos on our Verified Suppliers page.
Limitations
No lab profile would be complete without noting limitations:
- Janoshik tests the sample it receives. There is no guarantee that the tested sample is representative of what a supplier ships to customers.
- Testing is initiated and paid for by the submitter (the supplier or an individual), not by Janoshik on its own initiative.
- A Janoshik report confirms what was in one sample at one point in time. It does not certify ongoing product quality across all batches.
- Janoshik is not a regulatory body. Its reports are analytical data, not regulatory approval.
Summary
Janoshik Analytical is an independent third-party lab providing HPLC purity analysis, mass spectrometry identity confirmation, and endotoxin testing for peptides and research compounds. Its reports are verifiable using the verification key at janoshik.com/verify.