Janoshik testing explained: what the lab does, how to verify a report, and what one test can't tell you

Janoshik Analytical is a commercial testing laboratory whose reports can be checked on its own website, using the task number at the top of a report and the unique key at the bottom [1,2]. A successful check shows that the report in your hands matches the one the lab stored. It does not show that the vial you hold is the sample that was tested, and it does not show that the typed client or batch details are accurate.

What Janoshik is

Janoshik describes itself as an independent testing laboratory offering "reliable and verifiable analytical services", and says it has over 10 years of experience with chemical analysis of performance-enhancing drugs and related compounds [5]. The services page groups its work into categories that include peptides, anabolic steroids, SARMs and related compounds, and a harm-reduction group [4].

That is the lab's own description. A PubMed search for the term "janoshik" returned no results when we ran it, so there is no peer-reviewed evaluation of its methods for us to report [12]. You are weighing a company's account of itself, plus the reports it issues.

If you are looking for reviews, note that the lab's own about page carries customer quotes, which is marketing and not evidence of accuracy [5]. We read no independent audit of the lab's results, and we say nothing here about how testing works for customers in the UK specifically.

What the tests cover

The peptide tests the lab lists measure what is in a sample. The harm-reduction group covers contaminants and safety-related tests: heavy metals screening for arsenic, cadmium, lead and mercury, GCMS/LCMS screening for contamination, a CHNS mass report, endotoxin analysis and sterility testing by TAMC and TYMC [4].

The lab says it does not report peptide purity for blends of several peptides or for peptide capsules, because impurities or fillers can interfere with the measurement [7]. For what purity and the other tests mean in general, see how peptide purity is tested.

How to verify a Janoshik report

You verify a report by entering its task number and unique key on the lab's own verification page, which asks for exactly those two items [1]. The lab says the task number is at the top of the report and the unique key at the bottom, that the key must be typed in capital letters, and that a report missing either identifier cannot be verified [2].

1. Go to janoshik.com/verification yourself, not to a link supplied alongside the report.
2. Enter the task number and the unique key.
3. If the report is recognised, choose "Open report" to see the version stored by the lab [2].
4. Compare every line of your copy with the stored one.

The lab says a report is legitimate only if it matches the version in its system, and that any alteration means it cannot be considered legitimate [2]. The lab also says you can scan the QR code on the report, if there is one [2].

This check answers one question: is this document the one the lab issued? That is worth knowing, because a PDF is easy to edit.

What a test costs

The lab publishes a price for each test rather than a single rate. The prices below were listed on 1 November 2026 and are the lab's own figures:

Single-compound analyses sit between 215 and 450 dollars on that list, and blends cost more than either compound alone [14,15]. Two things follow from the way this is sold. The person ordering pays the bill, so the lab is independent of the sample, not of the buyer. And a report that covers one test answers one question, which leaves the other three open at whatever the next test costs.

A price list is not a quotation for your case. The compound, the number of compounds in the vial and the tests selected all move the number, and the lab prices some work by request [14]. For the full picture, including how a sample is commissioned and shipped, see what peptide purity testing costs.

What an altered or fake report looks like

A PDF is easy to edit, and the check above exists because of that. The failures worth knowing:

• No task number, or no unique key. The lab says a report missing either identifier cannot be verified [2].
• Any line that differs from the stored copy. The lab treats an altered report as not legitimate, whatever the reason given for the difference [2].
• A screenshot or a photo of a report. You cannot compare a stored document with a picture, and a picture carries no key to enter [1].
• A header that does not match your vial. Client, sample, manufacturer and batch are typed in by whoever ordered the test, and the lab says it stops changing them 14 days after issue [3]. A batch number in the header is a claim, not a match to the label in your hand.
• One report presented as covering a whole order. A report describes the sample that was sent [9].

HPR's rule is short: if a report cannot be checked on the lab's own verification page with both identifiers, treat it as advertising rather than evidence.

What the client, sample, manufacturer and batch fields mean

These four fields are header details, and the lab says the person ordering the test fills them in [3]. The client name defaults to "Anonymous" and the sample name defaults to a sample number, and the customer may keep those or type their own [3]. Before the lab receives the package, the customer can edit them freely; afterwards, changes go through customer support and the lab says it makes none more than 14 days after the report is issued [3].

So the client field tells you who ordered the test, or what name they chose to enter. The manufacturer and batch fields tell you what the orderer said the sample was. Verification confirms the stored report says the same thing as yours. It cannot confirm that the batch number typed in the header is the batch on your vial. The lab lists confidentiality among its values, describing "100% anonymous and secure test reports" [5].

A report also carries dates, including when the sample was received and when analysis was conducted. Those dates tell you how old the result is, which matters because peptides can degrade over time, a point the lab itself makes about purity [7].

What the Public Results page is

Janoshik has a Public Results page, and the lab says a client can pay to have a report published there for two months, with a separate paid option to place it nearer the top [6]. That makes it a selection that clients chose to publish. It is not a complete list of tests the lab has done, and it says nothing about reports clients left unpublished.

Where a single test stops

A single report covers one sample, for the tests ordered, on one date. Several limits follow from the lab's own descriptions and from published testing.

• The sample is chosen by the orderer. The lab says sterility testing needs unopened vials, and the recommended quantity is two peptide vials [9]. What was sent is a sample, not the whole batch.
• A pass is narrow. The lab says a sterility pass means no colonies were detected after cultivation, and that a fail alone cannot show where contamination came from [10].
• Tests answer separate questions. In a 2024 study of semaglutide bought from illegal online pharmacies, vials were free of viable microorganisms but all carried endotoxin at 2.1645 to 8.9511 EU/mg, and measured purity was 7.7% to 14.37% against 99% on the labels [11]. Each result came from a different test.
• Endotoxin has its own limits. The lab says it needs a separate vial for endotoxin analysis, does not test oils, raw API powders, tablets or capsules, and reports values below 1 EU/vial as estimates [8]. Our guide to endotoxin and sterility testing covers what those two tests measure.
• A report is a result for one lot. Storage and shipping happen after testing, and we found nothing in the lab's pages that addresses a vial other than the one it received.

For a section-by-section walkthrough of the document itself, see how to read a certificate of analysis.

What this means

HPR's position is that a verified Janoshik report is useful and incomplete in a predictable way. It is better evidence than an unverifiable PDF, because the lab can confirm the document is unaltered. It is weaker evidence than it can look, because the batch, manufacturer and client details were typed by whoever ordered the test, and one sample cannot speak for a lot.

Read it for which tests were run, which were not, the dates, and whether the batch matches the vial in your hand. We are not telling you any product is safe, and no report can. We are telling you what the document can prove, which is that it is the one the lab issued, and what it cannot.

Educational content only — not medical advice. Many peptides discussed on HPR are not approved for human use. Talk to a qualified clinician before making any decision about your health.