Janoshik Analytical: What It Tests, Prices, Turnaround, and Verification

What Janoshik Is

Janoshik Analytical describes itself as an independent testing laboratory offering reliable and verifiable analytical services, specializing in the analysis of anabolic compounds, peptides, SARMs and more, with over ten years of experience.⁵ It is independent in the sense that matters: it does not sell peptides, and its public report database states plainly that it has no affiliation with any of the companies or products listed.⁸ Over the last several years it has become the reference point for the research community, described by independent write-ups as the Prague-based lab whose public certificate portal made it the de facto reference.¹⁵²⁰

The legal entity behind it is Janoshik s.r.o., company ID ICO 17668727, with a registered office in Prague, filed in the Czech commercial register in October 2022.⁹ The About page names Peter Magic as owner and CEO alongside a small team, and positions the lab as serving clients worldwide with fast turnaround times.⁵ For the deeper question of whether a Janoshik report can be trusted, and how a genuine report differs from a doctored one, see our Is Janoshik legit explainer.

What Janoshik Tests

The catalog spans seven categories: peptides, anabolic steroids, SARMs and related compounds, SERMs and related compounds, sexual-health compounds, harm-reduction testing, and an others bucket.¹⁶ For any sample, the core report answers three questions:

Janoshik is not limited to identity and purity. It sells harm-reduction and injection-safety add-ons directly: endotoxin analysis (LPS, reported in EU/vial), sterility testing (TAMC/TYMC), heavy-metal screening (arsenic, cadmium, lead, mercury), a CHNS mass report for net peptide content, GCMS and LCMS contamination screening, TFA analysis, a fentanyl presence check, and pH measurement.³⁶ Standalone heavy-metal screening starts at 60 USD.² One honest limit remains: an HPLC purity figure says nothing about live microorganisms, so a vial can read high purity and still be non-sterile unless sterility is ordered.²³

How Janoshik Tests Tirzepatide

There is no standalone tirzepatide test at Janoshik. Tirzepatide is analyzed through the Common GLP-1 peptide blind test, which covers semaglutide, tirzepatide and retatrutide together: you do not have to declare which of the three is in the vial, and the test identifies the peptide, measures its amount, and reports peptide purity.³²⁴²⁷ On the product page captured 2026-03-06 the tirzepatide parameters read: CAS number 2023788-19-2, molecular weight 4813.5, testing method HPLC, result reported as mg per vial and peptide purity, average turnaround 5 days.³ The price was 360 USD on the homepage captured 2026-07-22 and 300 USD on the product page captured 2026-03-06.¹³

Tirzepatide is one of the two most-tested compounds in Janoshik's public database: an aggregator counted about 48 tirzepatide tests, roughly 27 percent of the sample it analyzed as of June 2026.²⁵ A real tirzepatide report sits on Janoshik's own portal, listed as report number 167347, Tirzepatide 20mg, with HHM Peptide Ltd shown as the vendor.⁸ Vendor-published figures show what a passing report can look like, though each belongs to that batch and not to tirzepatide in general: Chameleon Peptides published Janoshik reports for its tirzepatide showing 99.559 percent and 99.586 percent purity, measured content of 10.56 mg and 10.90 mg, and endotoxin of 1.197 EU/vial, each with a verify.janoshik.com link.²⁶

This is why identity and mass matter for GLP-1s, not just purity. One independent source reports that in 2025 roughly 23 percent of retatrutide samples it tracked contained exendin-4 analogs instead of authentic retatrutide, the kind of substitution a mass-spectrometry identity check is meant to catch.²⁴ For the compound profiles themselves, see our tirzepatide, retatrutide and semaglutide pages.

Janoshik Prices and Turnaround

Janoshik prices each test on a published list in USD and CZK. The figures below are dated to the janoshik.com capture they came from, because the live site blocks automated checks and prices do move: the GLP-1 blind test alone rose from 300 USD to 360 USD between the March and July 2026 captures.¹³

Add-ons on the product page captured 2026-03-06: endotoxin +120 USD, sterility TAMC/TYMC +240 USD, heavy metals +90 USD, CHNS mass report +120 USD, LCMS contamination screen +170 USD, TFA analysis +240 USD, fentanyl presence +60 USD, pH +30 USD.³ Report options on the 2025-12-21 pricing sheet include a public report at 70 USD, a sticky report for 7 days at 100 USD, and raw data at 5 USD.² Payment is by card (Visa, Mastercard, Amex, plus Apple, Google and Revolut Pay) or crypto (BTC, USDT and USDC on Ethereum), advertised as KYC-free.¹ Independent write-ups corroborate the 2026 pricing: one lists the GLP-1 blind test at 360 USD, single peptides at 215 or 290 USD, and the whole menu at 215 to 800 USD;²⁷ another puts a full GLP-1 panel (purity plus sterility plus endotoxin plus heavy metals) near 828 USD, with US shipping of 50 to 75 USD and rush at plus 100 percent.²¹

On turnaround, janoshik.com states a 5 day average for the GLP-1 peptide test, with the sterility add-on averaging 14 days;³ rush service is a 100 percent surcharge for results within 2 working days of receipt.³² Independent estimates put the typical turnaround at about 4 days²¹ to as much as 2 weeks.¹⁵All of that is lab time only: plan for the lab's stated 5 day average as the baseline and the wider range as real-world experience, with international post to Prague and any customs delay on top.

Is Janoshik Legit?

By the standards that apply to this space, yes. Janoshik is a real, independent third-party laboratory that does not sell what it tests, and its public database carries an explicit disclaimer that it has no affiliation with any of the companies or products listed.⁸²⁰ It is the most widely cited independent peptide lab, the default name on vendor certificates.²⁰²¹ For the full breakdown, including how to tell a genuine report from a doctored one, see our Is Janoshik legit explainer. This profile stays on the concrete record.

Two caveats are worth stating plainly. First, Janoshik is not ISO/IEC 17025 accredited; multiple independent sources say so,^15172223 and the accredited comparison in the table below, Vanguard, holds A2LA certificate 6377.01 to ISO/IEC 17025:2017.¹³ Second, the reputation is genuinely mixed: Trustpilot shows 2.9 out of 5 across 18 reviews, with gold-standard praise on one side and non-accreditation and methodology criticism on the other,¹⁷ while Scamadviser rates the site probably legit and flags crypto payment risk.²⁹ An independent investigation found Janoshik internally consistent and matching a second lab on the same batch, while a third lab differed by about 15 percent.¹⁸ And by Janoshik's own 2024 data, cited by one investigation, 43 percent of the peptides it tested that year failed to meet their label purity claims, a reminder that a Janoshik report grades what it receives, not manufacturing or storage.²²

Separately, an unauthorized party reportedly accessed Janoshik systems around early February 2026, exposing customer contact, order, shipping, report and sample-image data along with IP metadata; service was reportedly restored within about a day. The reporting site could not independently retrieve Janoshik's own disclosure, so read this as the lab's reported account rather than confirmed fact, and note it concerns customer data, not the report-verification portal.¹⁹

How to Submit a Sample

The process on janoshik.com is four steps: select a test, receive step-by-step shipping instructions, submit your tracking and report details through the order confirmation page or your account, then receive a secure digital report by email and in your account once the analysis is done.¹

Janoshik does not issue reports without a physical sample: its own FAQ answers the question "Can I get a report without sending a sample?" with a flat no.³ The stated sensitivity is, in the lab's words, a detection limit cutoff of less than 1/20th of the usual dosage per vial.³ A report describes only the sample it receives, so sending a representative sample of the batch is the general principle for establishing a component's identity and quality.³¹ If you are still weighing whether a source deserves your trust, our guide on choosing suppliers covers the earlier checks.

How to Verify a Report

Every report in Janoshik's database is verifiable, and the mechanism is specific. Each certificate carries a Task number at the top and a case-sensitive Unique key at the bottom; enter both on the verification page at janoshik.com/verification, or search the public database at public.janoshik.com.⁷⁸²⁴ A QR code on the report resolves to the same record on Janoshik's own servers, at verify.janoshik.com, not on the vendor's site.²⁴²⁵²⁰

A Janoshik report typically shows the batch identifier, the requested compound, an HPLC chromatogram with peak integration, the main-peak purity percentage, the related-impurities profile, a mass-spectrometry chromatogram with theoretical and measured molecular weight, the water content by Karl Fischer titration, and the analyst's signature with the report date; mass measurements carry a stated 5 percent error margin.²⁸²⁴ Read identity, purity and amount together, not one at a time.

The portal is what defeats fakes: a doctored certificate will not match the database entry,²¹ screenshots can be edited but the portal cannot, and a report with no verifiable code is unverified.³⁰ The failure mode is almost always misuse of Janoshik's name rather than the lab's testing: in one documented case a vendor doctored a real Janoshik certificate whose task number actually resolved to bacteriostatic water.²¹ For the full genuine-versus-doctored checklist, see our Is Janoshik legit explainer and the general how to verify a peptide COA guide.

Janoshik vs Other Peptide Testing Labs

Janoshik wins on speed, price and how widely its reports are recognized. Look elsewhere when you need a US-based lab, formal ISO/IEC 17025 accreditation, or a scope it does not cover. The accredited comparison here is Vanguard; MZ Biolabs is a DEA-licensed US option; Titreon is another independent lab with per-batch verifiable COAs.

See the full lineup, with cost, turnaround and scope for each, in the peptide testing labs directory, or the side-by-side view in our comparison of peptide testing labs.

Our supply partner Peptara Labs publishes its batch analysis certificates, tested by Titreon Analytical.

Pros, Cons & Who It Is For

Who it is for: almost anyone running a first check on a new vial or supplier, where speed and price matter and the question is simply whether this is the right compound at the stated purity and amount. If you specifically need a US lab, formal accreditation, or a scope Janoshik does not cover, weigh the alternatives in the directory instead.