What Is Janoshik Testing? Third-Party Peptide Lab Reports Explained

Janoshik is the independent lab most trusted for research-peptide analysis. Here is what its reports show and how to read one.

If you have spent any time researching peptide suppliers, you have seen the name Janoshik. It is the independent analytical laboratory most widely referenced for research-peptide testing, and a Janoshik report is often treated as the benchmark COA in this market. This guide explains what Janoshik actually tests, what a report shows, and how to read one.

What Janoshik is

Janoshik is a third-party analytical laboratory — independent of the suppliers whose products it tests. That independence is the whole point: a lab report only means something if it comes from an organisation with no stake in the result. When a supplier publishes a Janoshik COA for a batch, it is providing an outside measurement rather than marking its own homework.

What a Janoshik report shows

• Purity — typically measured by HPLC (high-performance liquid chromatography), expressed as a percentage.
• Identity / mass — often confirmed by mass spectrometry, checking the compound matches its expected molecular weight.
• Quantity — confirming the amount of peptide present.
• Batch number and date — tying the report to a specific production batch.

Why third-party (not in-house) matters

An in-house or supplier-generated certificate has an obvious conflict of interest. A genuine third-party report from a lab like Janoshik removes that conflict, which is why batch-specific third-party testing is the single most useful quality signal when choosing a research-peptide supplier.

How to check the report matches your vial

The most important step is to match the batch number on the report to the number on the vial you receive. A report for a different batch — or no batch number at all — does not verify your material. Then look at the stated purity and identity results. For a full walkthrough of every field, see how to read a peptide Certificate of Analysis.

Can a COA be faked?

Unfortunately yes — which is exactly why you should verify rather than assume. Match the batch number, confirm the report is genuinely from the third-party lab, and be wary of suppliers who provide only a single generic report across every product. If in doubt, ask the supplier directly for the batch-specific report before ordering.

Frequently asked questions

What does Janoshik test?

Typically purity (by HPLC), identity and mass (often by mass spectrometry), and quantity, tied to a specific batch number and date.

Can a peptide COA be faked?

Yes, which is why you should verify it. Match the batch number to your vial, confirm the report genuinely comes from the third-party lab, and be cautious of a single generic report reused across products.

What purity should I look for?

Reputable research suppliers publish the measured purity for each batch. The key point is that a genuine, batch-specific third-party figure exists and matches your vial — rather than an unverified claim.

Do all Helix products have a COA?

Helix references identity and purity per batch and publishes lab reports on the product pages wherever testing has been completed; a batch-specific report can be requested for any item.