Guides & comparisons
Janoshik report check: how to verify a peptide test
To verify a Janoshik report, open verify.janoshik.com, enter the task number and unique key printed on the report (or scan its QR code), and compare compound, sample name, result and date with the copy you were given. A match proves the lab issued that result for that sample. It does not prove the sample came from your batch.
Most certificates that circulate around research peptides in Europe carry one laboratory name: Janoshik Analytical, in the Czech Republic. The lab tests what anyone posts to it and issues a report per test, which it calls a task. That makes the report easy to check, and easy to over-read. This guide covers both halves: the two-minute check, and what the check can and cannot tell you.
How do you verify a Janoshik report?
- Find the two codes. Every report carries a task number and a unique key. The key is a string of letters and digits printed near the QR code.
- Open the lab’s page. Go to verify.janoshik.com and enter both codes, or scan the QR code on the report, which opens the same page. Older reports may resolve to a page on janoshik.com instead. Either way the page is hosted by the lab, not by the shop, so a shop cannot fake it.
- Compare line by line. The lab’s page shows the report as issued. Check the compound, the sample or client name, any batch or lot the client gave, every result (purity, quantity in mg, identity) and the test date against the copy you were sent. Screenshots and re-saved images are common and fine. Different numbers are not.
- Look at the photos, if there are any. Some reports include photographs of the sample as the lab received it.
If the codes are missing, or the page shows something else, you do not have a verifiable Janoshik report, whatever the logo says.
What do the sample photos tell you?
When a client orders a test with pictures, the report shows the vial as it arrived: cap colour, label, sometimes a handwritten code. That is the closest thing to a physical link between the paper and an object. Hold your vial next to it. Same cap, same label, same batch code is a good sign. A branded label from a different company means the report describes someone else’s sample.
Many reports instead say “Pictures not included”. That is a choice the client made when ordering, not a fault. It does mean the batch number has to carry the whole match on its own.
What does a match prove, and what not?
A match proves one thing: Janoshik issued this result for a sample it received. It does not prove:
- That the sample is your batch. The lab tests what it is sent. A genuine report on a good batch can stay on a product page while another batch ships. Only a batch or lot number that matches your label, character for character, ties the two together. More on that in fake, recycled and mismatched COAs.
- That the shop sent it. The name on the report is the client who submitted the sample. It is often a manufacturer, a group buy or another shop. That can be legitimate, but it is a different claim from “we tested our stock”.
- Sterility, endotoxins or storage. A purity and identity test says nothing about them unless those tests are listed on the report. See what a COA cannot tell you.
The public results at public.janoshik.com are useful for searching by compound or test number, but they are self-selected: clients choose what they publish.
Is Janoshik accredited?
As of 7 October 2026, janoshik.com makes no ISO/IEC 17025 claim, and its report pages carry no accreditation-body symbol. That is a scope statement, not a criticism of the lab’s work. It does mean that “ISO-accredited Janoshik test” describes something that does not exist. How to check any lab’s accreditation yourself is in verifying the lab itself.
What should you ask the shop?
One line covers it: “Which task number and key, and does the batch on the report match the batch on my vial?” A shop that answers all three has given you something you can check yourself. To read the rest of the certificate, start with how to read a peptide COA.
Sources
- Janoshik Analytical, report verification — verify.janoshik.com
- Janoshik Analytical, public results — public.janoshik.com
- Janoshik Analytical, service overview — janoshik.com
- ISO/IEC 17025:2017, General requirements for the competence of testing and calibration laboratories — iso.org
This is document handling for research-use-only materials, not advice about use. Nothing here is a judgement about any particular supplier.
Questions this guide answers
- How do I verify a Janoshik test report?
- Find the task number and the unique key on the report, enter both at verify.janoshik.com, or scan the report's QR code, which opens the same lab-hosted page. Then compare the compound, the sample or client name, the results and the test date on the lab's page with the copy you were sent. Any difference means the copy is not the lab's report.
- What does a verified Janoshik report prove?
- That Janoshik issued this result for a sample it received from the client named on the report. It does not prove that the sample came from the batch in your hand, that the client is the shop selling to you, or anything about sterility or endotoxins unless those tests are listed on the report.
- What does 'Pictures not included' mean on a Janoshik report?
- The client ordered the test without photographs of the sample. Reports with photos show the vial as the lab received it, including cap colour and any label or handwriting, which helps you match it to what you hold. Without photos that visual link is missing, so the batch number has to carry the whole match.
- Is Janoshik Analytical ISO/IEC 17025 accredited?
- As of 7 October 2026, janoshik.com makes no ISO/IEC 17025 claim and its report pages carry no accreditation-body symbol. That is a scope statement, not an accusation: a lab can do competent work without accreditation, but a report cannot be described as accredited when the lab does not claim it.