Janoshik Peptide Test Results: How to Read & Verify | Regena

Researchers search for the lab under several names — "Janoshik", "Janoshik Analytical", "JanoshikAnalytical", "Janoshik lab" or "Janoshik test". They all refer to the same independent testing laboratory, and the same report format. This page covers all of them in one place: who the laboratory is, what its reports show, and how to check a report against the vial in your hands.

Report verification happens on the laboratory's own site at janoshik.com/verify, using the verify key printed on each report. Regena's published Janoshik reports are listed on the lab reports page and the independent testing results page, each with the batch code it belongs to.

Janoshik Analytical is an EU-based independent analytical laboratory specialising in research-peptide and small-molecule analysis. The laboratory is operationally independent from peptide manufacturers and suppliers, which is the essential property that gives its reports weight: a Janoshik COA carries no commercial incentive to over-report purity or under-report related impurities.

Janoshik routinely publishes its analytical methods, instrumentation and acceptance criteria, and its reports use a consistent layout that is easily cross-referenced against the batch number on the vial cap. Across the research-peptide industry, a Janoshik report is treated as the minimum credible evidence that a batch has been independently verified.

A standard Janoshik peptide report contains: the batch identifier, the requested compound, the HPLC chromatogram with peak integration, the main-peak purity percentage, the related-impurities profile, the mass-spectrometry chromatogram with theoretical and measured molecular weight, the water (Karl Fischer) content, and the analyst's signature with the report date.

The HPLC chromatogram is the single most important panel: it shows the main peak (the target peptide), the area under that peak as a percentage of total integrated peak area, and the secondary peaks (the related impurities). The mass-spectrometry panel confirms identity — that the main peak is in fact the compound named on the label and not a same-mass-region impurity or a truncated sequence.

Every Regena batch is sent to Janoshik (or, where batch chemistry calls for an orthogonal method, to a second independent laboratory) before any vial is released to dispatch. The Janoshik COA is matched against the batch number printed on the vial cap, archived on the Regena lab reports page, and shipped with the order so the receiving laboratory can re-verify the chain of custody on arrival.

Regena's minimum specification for batch release is ≥99.0% HPLC main-peak purity with matching mass-spectrometry molecular weight and water content within the published specification for the compound. Batches that do not meet the specification are not released, regardless of supply pressure.

A receiving researcher should perform three checks before reconstitution: (1) the batch number on the vial cap matches the batch number on the Janoshik report; (2) the report date is within the shelf-life window for the compound; (3) the report identifies the correct compound at the correct molecular weight.

If any of those three fail, do not reconstitute the vial — contact Regena consultations and the team will replace the batch and investigate the discrepancy. The cross-reference takes under a minute and is the single best protection against handling a mis-labelled or mis-shipped vial.

Janoshik is not the only credible independent peptide laboratory — Anresco, Auriga Research, and several university-hosted core facilities also produce credible COAs. The advantage of Janoshik is consistency: the report format is the same across suppliers and across years, which makes cross-supplier batch comparison straightforward.

Regena occasionally uses an orthogonal laboratory when batch chemistry calls for a second-instrument confirmation, when the receiving institution has a specific accredited-laboratory requirement, or when Janoshik's queue would delay release beyond the project window. The default remains Janoshik for the cross-supplier comparability it offers.

A Janoshik COA is an analytical report, not a sterility certificate, not a clinical authorisation and not a Material Safety Data Sheet. The report covers chemical identity, purity and related impurities for the analysed sample; it does not certify that the rest of the batch is sterile, does not authorise human use, and does not replace institutional ethics or biosafety procedures.

Regena issues sterility, MSDS, CoO and CoC documentation separately on request — most commonly for institutional buyers operating under formal procurement systems. The Janoshik COA sits alongside that documentation, not as a substitute for it.

Every Regena batch COA is published on the /coa lab reports page, indexed by compound and batch number. New batches appear within 24 hours of independent release. The same COA is also bundled with the shipment, printed and electronic, so the receiving researcher can confirm the report before reconstitution.

If a batch number printed on a Regena vial cannot be found on the /coa page, contact consultations immediately — that is a chain-of-custody flag and the Regena team will replace the batch while the discrepancy is investigated.

Research-peptide supply has matured fast over the past three years and so has the pressure on suppliers to short-cut analytical verification. Supplier-funded in-house COAs are the most common short-cut: they look like a Janoshik report at a glance but the analytical laboratory is not commercially independent from the supplier, which removes the property that gives a third-party COA its weight.

Regena's position is straightforward: a batch without an independent COA does not ship. Janoshik is the default, an orthogonal independent laboratory is the fallback, and the COA travels with every shipment to every research jurisdiction Regena serves.

Field 1 — batch identifier. This is the string printed on the vial cap and on the shipping label; it is the key that ties the report to your physical vial, so it is the first thing to match. Field 2 — HPLC chromatogram. Read the main peak's retention time and the integrated area percentage; the related-impurities panel beneath it shows each secondary peak's share, which is the honest breakdown a single purity number flattens.

Field 3 — mass spectrometry. The theoretical molecular weight for the named compound is published chemistry; the measured value on the report must match it within the instrument tolerance. Field 4 — water content. Karl Fischer water is reported separately because lyophilised peptides hold residual water by design; the published specification for the compound defines the acceptable range. Field 5 — analyst signature and date. A report without an analyst signature is not a finished report.

Running the five fields in order takes a couple of minutes and produces a defensible record for an institutional file: who analysed it, what was measured, and whether it matches the vial in hand.

The analytical panels on a competent in-house certificate can look identical to a third-party report — HPLC trace, purity percentage, molecular weight. The difference is structural, not technical: an in-house certificate is produced by the seller, so the incentive sits on the same side of the transaction as the batch being certified. That is why the reference practice in the research community is to weight third-party certificates above self-issued ones, regardless of the numbers printed on them.

A second practical difference is traceability after the fact. A third-party laboratory's reports can be re-checked years later through the public COA archive; a supplier's in-house spreadsheet has no external counterparty to verify against. When a protocol ends up in an institutional write-up or an audit, that distinction is the one reviewers ask about.