How to Verify a Janoshik Report (and Is Janoshik Legit?)

Last updated October 31, 2026. Amino Review has no relationship with Janoshik Analytical. Facts about Janoshik’s process come from its own help center, read on October 31, 2026. Findings about specific reports come from our vendor checks, as described in How We Evaluate Vendors.

Janoshik Analytical is one of the most cited testing labs in the research-peptide market. Vendors post its reports as COAs, and buyers send it samples of their own. This guide covers how its verification works, what a verified report does and doesn’t prove, and the red flags we see most often.

What Janoshik is

Janoshik Analytical is a commercial analytical lab in the Czech Republic. The Czech business register (ARES) lists Janoshik s.r.o., company number 17668727, formed on October 25, 2022, with its registered office in Prague 1. The janoshik.com domain was registered in 2016.

Janoshik’s help center describes an ordering process open to any customer: order online, post the sample, and receive the report by email and in your account. It says routine analyses take on average less than two days after the sample arrives, and that its TAMC/TYMC sterility test takes at least two weeks. It also offers group testing, where several people share the cost of one analysis.

How to verify a Janoshik report, step by step

Janoshik’s help center gives two ways to check a report: its Verification page, or the QR code on the report, if there is one.

1. Find the task number at the top of the report and the unique key at the bottom. Janoshik says a report missing either one cannot be verified, and recommends asking the vendor for the full version.
2. Go to janoshik.com yourself and open its Verification page. Don’t rely on a link supplied with the report.
3. Enter the task number and the unique key. Type the key in capital letters, as the help center advises.
4. If the report is recognized, choose “Open report” to see the copy stored in Janoshik’s system.
5. Compare the stored copy with the vendor’s copy, line by line.

Janoshik’s rule is strict: a report is legitimate only if it matches the version stored in its system, and a copy altered in any way is not legitimate. In our checks, stored reports open at addresses on verify.janoshik.com that contain the task number and the key. Janoshik’s sites use a browser check, so automated tools are often blocked, but an ordinary browser works.

What to compare on a Janoshik report

• Task number and unique key: they must be the ones on the vendor’s copy.
• Client, sample, manufacturer and batch: the header fields (see the next section).
• Dates: a report can show when the test was ordered, when the sample arrived and when it was analysed. Peptide Giants’ lab table gave May 20, the order date, for a Tesamorelin report analysed on May 28. That is a small slip, but it shows why each date needs reading.
• Results: the amount in mg, purity, and any endotoxin, heavy-metal or sterility lines.
• Photos: some reports show the vial the lab received. MyPurePeptide’s own notes flag six reports where the photographed vial appears to show a different lot from the report’s batch field.

The header fields are typed by the customer

This is the point most buyers miss. Janoshik’s help center says the client name, sample name, manufacturer and batch number are “report header details” filled in by the person who orders the test. The client name defaults to “Anonymous”. The customer can edit these details until the lab receives the package. After that, changes go through support, standard changes cost a fee, and no changes are possible more than 14 days after the report is issued. Extra copies with different header details must be ordered before testing finishes.

So a verified report confirms that Janoshik tested a sample and stored these words with it. It doesn’t confirm that the batch typed in the header is the batch in your vial, or that the manufacturer named actually made it. A report with client “Anonymous” and manufacturer “Unknown” can’t be tied to any vendor. We have found such reports in several vendor libraries, including four in MyPurePeptide’s, three of which predate its domain.

What the results mean

• Purity: Janoshik defines peptide purity as the share of the peptide content that is the intact target peptide. The rest is degradation products. Purity is not the amount in the vial.
• No purity for blends or capsules: Janoshik says it does not report peptide purity for blends of more than one peptide, or for peptide capsules. A purity claim for a blend that rests on a Janoshik report needs a second look. MyPurePeptide shows “≥99% by HPLC” on four product pages whose linked reports print no purity.
• Ranges: some reports give purity as “96%+” or “98%+”. Janoshik says these mean 96–98% and 98–100%. Others print an exact figure, such as the 98.641% on a Peptide Giants report we verified.
• Amount: measured milligrams, sometimes for several vials. Compare it with the label. MyPurePeptide’s lab-confirmed Janoshik reports include Epitalon at 86% of label and a CJC-1295/Ipamorelin blend at 87%.
• Sterility: Janoshik’s TAMC/TYMC test is a cultivation test for bacteria, yeast and mold, reported as pass or fail. We treat it as a microbial screen, not the compendial USP <71> sterility test.

What a verified Janoshik report doesn’t prove

• That the sample represents the batch. Whoever ordered the test chose the sample.
• That your vial came from that batch, unless the batch on your vial matches the header, which the customer typed.
• That the lab is accredited. Janoshik publishes no ISO/IEC 17025 accreditation. Third-party checks of the Czech accreditation body and of the A2LA, PJLA and ANAB registers found none. We did not search the registers ourselves.
• That the vendor tests every batch. Janoshik’s public results page shows only reports whose clients pay to publish them. The help center lists US$85 to show a report for two months, and US$120 to place it near the top for seven days. The page says Janoshik does not endorse the companies listed.
• That the testing is independent of the vendor. A report a vendor commissioned is still a vendor document, even when the lab is real.

Red flags on Janoshik COAs

• No task number or unique key, or a cropped image that hides them.
• A key that doesn’t open a report, or a stored report that differs from the vendor’s copy in any field.
• Client “Anonymous”, or another company’s name, on a report presented as the vendor’s own testing.
• A batch that is blank, “Unknown”, or different from the lot on the product.
• A sample name for a different size or compound from the product it is posted on.
• A claim that Janoshik is ISO 17025 accredited. Third-party lab checkers have documented vendors describing it that way, and neither Janoshik nor the registers support it.
• A second Janoshik-branded site. janoshiklab.com, registered on July 22, 2026, presents itself as Janoshik, with its own verification form and email address, and does not link to janoshik.com. We could not confirm who runs it. janoshik.com was registered in 2016, and its help center at help.janoshik.com documents the verification process described above.

How Janoshik compares with other labs in our reviews

Janoshik is one of several labs vendors use. This is how the others verify, from our own checks:

• Freedom Diagnostics (Franklin, Tennessee): a search code opens the PDF on the lab’s server, so a vendor copy can be compared byte for byte. The reports we checked include LC-MS identity. Freedom describes itself as compliant with ISO 9001 and GLP principles, not as ISO/IEC 17025 accredited. Used by Nova Life Peptides, Simple Peptide, Nura Peptide and Nova Peptides.
• Vanguard Laboratory (Olympia, Washington): a Laboratory ID looks up the report on verifiedbyvanguard.com, but only reports a client chooses to publish appear there. Its A2LA scope does not include HPLC. See our Peptide Giants review.
• Kovera Labs (Buffalo Grove, Illinois): a QR code or report number opens the record on koveralabs.com. Kovera re-rendered IDUN’s reports in October 2026, so older vendor copies can differ from the lab’s current file in dates and test names. It makes no accreditation claim. See our IDUN Peptides review.
• ILS Laboratories (San Diego): an access code or QR code opens the record on ILS’s portal, which doesn’t always serve a PDF, so checks are often field by field. ILS says peptide testing is outside any accreditation scope. See our Amino Club review.

For Janoshik itself, our MyPurePeptide review covers 161 reports checked one by one. For the general method across all labs, see How to Verify a Peptide COA.

How we use Janoshik reports in our grades

We count a Janoshik report as laboratory-confirmed only when we have opened it on Janoshik’s site and every field matches the vendor’s copy. Reports we couldn’t open stay vendor documents. We don’t score any lab’s accreditation, but a vendor’s claim that its lab is accredited when it isn’t counts against the vendor’s claims score.

Compare vendors, and see which labs each one uses, on our peptide vendor reviews page.

Frequently asked questions

Is Janoshik legit?

Janoshik Analytical is a real lab: the Czech business register lists Janoshik s.r.o., and its verification system works. We opened all 161 Janoshik reports in one vendor’s library on Janoshik’s site. It publishes no ISO/IEC 17025 accreditation, and a genuine report shows only what was in the sample someone chose to send.

How do I verify a Janoshik report?

Find the task number at the top of the report and the unique key at the bottom. Enter both on the Verification page at janoshik.com, typing the key in capital letters, or scan the report’s QR code if it has one. Open the stored report and compare every line with the copy you were given.

Why does a Janoshik report say “Anonymous”?

The client name defaults to “Anonymous” unless the person ordering the test types another name. An anonymous report can be genuine, but nothing on it ties it to a particular vendor.

Is Janoshik ISO 17025 accredited?

Janoshik publishes no ISO/IEC 17025 accreditation, and third-party checks of the Czech accreditation body and the A2LA, PJLA and ANAB registers found none. We did not search the registers ourselves.

Why won’t my Janoshik report verify?

Check that you have both the task number and the unique key, and that you typed the key in capital letters. If either is missing, Janoshik says the report cannot be verified, so ask the vendor for the full version. If the details are right and no report opens, treat the copy as unverified.

Does a verified Janoshik report prove my vial is pure?

No. It proves Janoshik tested a sample and stored the report you are holding. The client, manufacturer and batch fields are typed by whoever ordered the test, so the report describes your vial only if the batch matches and the sample was typical of that batch.

What is Janoshik’s public results page?

It lists reports whose clients paid to publish them, for two months at a time. It is a selection chosen by clients, not a full record of what Janoshik has tested.

Research use only: products discussed here are sold by third-party vendors, labeled for research use only, and are not approved drugs. This guide explains how to check documents; it is not medical, legal, or purchasing advice. See our full disclaimer. Corrections are welcome at contact@aminoreview.com.