What Is Janoshik? Janoshik Analytical Lab Explained — Location, Tests and Turnaround

Most research peptide vendors now attach a lab report to their listings, and a large share of those reports carry the same letterhead. This article is Janoshik Analytical explained for the working researcher: who the laboratory is, which analytical methods it actually runs, how an individual report can be checked against the issuing lab rather than against the vendor's website, and — just as importantly — the questions a Janoshik report does not answer.

Key takeaways

What is Janoshik? Who Janoshik Analytical is

Janoshik Analytical is an independent analytical laboratory based in Prague, Czech Republic. "Janoshik lab", "Janoshik labs" and "Janoshik Analytical" all refer to the same laboratory. It is a contract testing service: a client sends in a physical sample, the lab runs a defined set of analyses, and the lab issues a report. Its client base spans research chemical suppliers, community testing programmes, and individual buyers submitting samples anonymously.

The relevant structural fact is that Janoshik has no commercial interest in the outcome. It is paid for the analysis, not for a favourable result. That independence is what separates a third-party report from an in-house claim, and it is the reason we publish the underlying certificates rather than summarising them.

Independence is not the same thing as accreditation. ISO/IEC 17025 accreditation is a formal, audited scope covering specific methods, and researchers who require accredited data for a regulated workflow should confirm a laboratory's current accreditation status directly with that laboratory rather than inferring it from the presence of a report.

Where is Janoshik located?

Janoshik is located in Prague, Czech Republic. The operating company, Janoshik s.r.o., is entered in the Czech commercial register (company ID 17668727) with its registered office in Prague's Staré Město (Old Town) district. Janoshik accepts samples from other countries, and its website says detailed shipping, packaging and labelling instructions are sent after a test is ordered and paid for.

How long does Janoshik testing take?

Janoshik's homepage displays a live average lab turnaround measured from sample receipt, with a separate, faster figure for rush testing; when we checked on 9 October 2026 it showed 38 hours for standard testing. That clock starts when the sample arrives, so international shipping time comes on top, and the figure is an average across tests rather than a guarantee for any one test.

What the laboratory actually measures

Janoshik's peptide services cluster around a few analyses. Each answers a narrow, specific question.

Why purity and quantity are separate questions

A vial can return a high purity figure and still contain less material than the label states. Purity is a ratio describing the composition of whatever is in the vial; quantity is an absolute mass. A report showing 99% purity on a vial holding 6 mg of a nominal 10 mg fill is, strictly read, an accurate report of a shortweight product. Researchers evaluating a supplier should check whether the report includes a quantity determination at all, and compare the reported mass against the labelled fill.

How a Janoshik report is verified

This is the part most buyers skip, and it is the only step that distinguishes a genuine report from a PDF someone edited. Janoshik maintains its own verification records, so a report is checked on Janoshik's site rather than the vendor's, and the batch on the report has to match the lot on the vial you received. A supplier can hold one genuinely excellent report and display it indefinitely across batches that were never tested; batch-level correspondence is the whole point.

The step-by-step procedure, using the task number and unique key printed on a report, is in our Janoshik COA verification guide.

What a Janoshik report does not tell you

• It says nothing about batches never submitted. A public database only contains what a vendor chose to send. Absence of a bad report is not evidence of consistency.
• It describes one sample at one point in time. It carries no information about storage, transit temperature, or handling after the sample was drawn.
• It is silent on excipients and formulation unless those analyses were specifically commissioned.
• It is not a quality system. A report is a measurement; traceability, lot control, and cold chain are separate disciplines.

How this maps to our catalogue

Hermetica Research Labs publishes the third-party certificates associated with each production lot on our COA page, including reports issued by Janoshik Analytical and Freedom Diagnostics, so that the lot number on a vial can be matched to a specific document rather than to a generic quality claim. This applies across the catalogue — including BPC-157 10mg, GHK-Cu 50mg, and Retatrutide 10mg.

We would encourage researchers to verify those documents at the issuing laboratory rather than take our word for them. A supplier that objects to independent verification of its own paperwork has told you something useful.

Research use only. All materials described here are supplied strictly for in-vitro laboratory research and analytical use. They are not drugs, foods, cosmetics, or medical devices, are not approved by Health Canada for any therapeutic purpose, and are not intended for human or veterinary consumption or administration. Nothing in this article constitutes medical, clinical, or regulatory advice.

In our own catalogue, Janoshik issued the current certificate for the BPC-157 Canada lot, and the peptides Canada catalogue shows which laboratory issued each published COA.

The Janoshik reports referenced here are published in full, with test numbers and batch identifiers intact, in the COA library. Lot-matched documentation sits on each product page, including BPC-157, TB-500 and MOTS-c.

Frequently asked questions

What is Janoshik Analytical?

Janoshik Analytical is an independent analytical laboratory that tests submitted peptide samples and issues reports that can be checked on its own website.

How do I verify a Janoshik report?

Go to janoshik.com yourself, open Verify, and enter the task number and unique key printed on the report. The archived record should match your copy field for field.

Does a Janoshik report cover my vial?

Only if the batch matches. A report describes the sample that was tested, so the batch on your vial label must match the one on the report.

Which Hermetica products have Janoshik reports?

BPC-157 10mg (Test #97457, Batch 1208), TB-500 10mg (Test #97450, Batch 1208) and MOTS-c 10mg (Test #97459, Batch 1218).

References

1. Janoshik Analytical. Test Report #97457, BPC-157 10 mg, Batch 1208; analysis conducted 8 January 2026. Certificate image published by Hermetica Research Labs. View certificate
2. D'Hondt M, Bracke N, Taevernier L, Gevaert B, Verbeke F, Wynendaele E, De Spiegeleer B. (2014). Related impurities in peptide medicines. Journal of Pharmaceutical and Biomedical Analysis, 101, 2–30. doi:10.1016/j.jpba.2014.06.012
3. International Council for Harmonisation. (2023). ICH Q2(R2) Guideline on validation of analytical procedures, Step 5 (EMA/CHMP/ICH/82072/2006). ema.europa.eu (PDF)

Research Use Only. Not for human or veterinary use. Purchasers must be 21 or older.