Janoshik Lab Review: Czech Republic Base, HPLC Services and Verification

Last Updated: April 2026

Janoshik Analytical is based in the Czech Republic and operates the testing portal at janoshik.com. It is not a US-based lab. Founded by Peter Magic, it provides independent HPLC and mass-spectrometry analysis of peptides, anabolic steroids, and SARMs for buyers and vendors worldwide — and is the most widely referenced independent peptide testing service in the English-speaking research-peptide community.

Most searches that bring readers to this article fall into one of two camps: vendor-claim verifiers who saw "Janoshik tested" on a peptide site and want to confirm the lab is real, and sample senders who want to ship a vial for independent testing and need the address, cost, turnaround, and process. This guide answers both. For the full lab profile, see Peptigrity's Janoshik lab profile; for the broader testing market, see Peptigrity's testing labs directory.

Peptigrity is an independent peptide review platform — it does not sell peptides, takes no affiliate commissions from any vendor, and has no commercial relationship with Janoshik Analytical or any other testing laboratory. That independence is what allows this article to describe Janoshik's strengths and limitations honestly without the vendor incentive that distorts most "Janoshik tested" coverage online.

Where exactly is Janoshik located?

Janoshik Analytical is located in the Czech Republic — a Central European EU member state, outside the Eurozone — and operates from the domain janoshik.com. The lab accepts samples from buyers worldwide via FedEx and UPS, with the carriers handling EU customs clearance into Czechia. Janoshik does not have a US branch, a UK branch, or any other regional office; all testing is performed at a single Czech facility, and all certificates are issued from there with the same Task-number verification system regardless of where the sample originated.

The lab's full operational name is Janoshik Analytical. It is sometimes referred to colloquially as Janoshik Labs or Janoshik Analytics, but these are alternative names for the same entity. The single operating domain is janoshik.com; older forum posts occasionally reference janoshik.eu, which redirects to the current site. The contact email info@janoshik.com is the primary inbound channel for non-order inquiries.

Why isn't Janoshik in the US, UK, or Australia?

The keyword "where is Janoshik located in USA" exists in search data, which suggests a meaningful share of US buyers assume Janoshik is domestic. It isn't. Janoshik was founded as a Central European harm-reduction analytical service rather than as a US-targeted business — a distinction that matters operationally. A Czech facility operates outside FDA jurisdiction, which simplifies the lab's stance on testing unapproved compounds: the FDA's Food, Drug, and Cosmetic Act doesn't reach a laboratory in Czechia, so Janoshik can analyze whatever samples buyers send without the regulatory exposure a US-based lab would face for the same work.

International accessibility is built into the operational model. FedEx and UPS handle EU import customs and clearance fees on Janoshik's preferred shipping configurations, which means a US, UK, or Australian buyer pays one shipping fee at dispatch and faces no surprise customs charge on the receiving end. The single-facility model also means every COA carries the same verification format — a buyer in Sydney comparing two COAs from different vendors can verify both via the same janoshik.com Task-number portal.

Has Janoshik ever been based somewhere else?

Janoshik has operated from the Czech Republic throughout its public history. Older forum threads and PED-community posts sometimes reference janoshik.eu as the lab's domain, which created confusion about whether the lab had moved or rebranded. The current operating domain is janoshik.com, and the lab's location remains the Czech Republic. The .eu redirect handles legacy traffic from buyers who bookmarked the older URL.

Who is Janoshik? (Who runs the lab and what they actually do)

Janoshik Analytical was founded and is operated by Peter Magic, an analytical chemist based in the Czech Republic. The lab specializes in chemical analysis of performance-and-image-enhancing drugs — anabolic steroids, peptides, SARMs, and pharmaceutical compounds — for buyers, vendors, and harm-reduction-minded consumers worldwide. Magic gave a long-form interview to Derek of More Plates More Dates in April 2026 covering testing methodology, common identity errors in the peptide market, and the lab's stance on independence from vendor relationships. The interview is the single most direct primary source available for understanding how Janoshik operates.

The lab is structurally independent of the peptide market it analyzes. Janoshik does not sell peptides, steroids, SARMs, or any other compound. It does not partner with vendors as a preferred-lab arrangement. It does not take affiliate commissions or referral payments. Its revenue model is direct payment for tests — from buyers verifying a vendor's claim, from vendors documenting their own batches, and from harm-reduction-minded users confirming what they already own.

How long has Janoshik been operating?

Janoshik has been operating as a harm-reduction analytical service since the mid-to-late 2010s. The exact founding year is not foregrounded on the lab's site — Magic discusses the lab's evolution in the April 2026 interview but does not pin a specific incorporation date for public reference. The operationally relevant point is that the Task-number COA archive on janoshik.com extends back several years, which is the practical depth most buyers care about when verifying older COAs that vendors still circulate.

What does "harm reduction lab" mean in this context?

A harm-reduction laboratory tests substances people have already decided to use, with the goal of giving those people accurate information about what they are putting into their bodies. This framing distinguishes Janoshik from two adjacent categories: regulatory compliance labs (which test for FDA, EMA, or other regulator submissions and operate under accreditation regimes like ISO/IEC 17025), and forensic labs (which test seized or contested samples for legal proceedings). Janoshik does not occupy either of those roles. It tests samples for the customer's own information, returns the results to the customer, and does not share data with regulators or law enforcement.

The harm-reduction framing also explains the operating culture. Buyers do not need a prescription, an institutional affiliation, or a research justification to send a sample. The lab's published philosophy treats analytical transparency as a public good — accurate purity and identity information helps buyers make informed decisions in markets where regulatory protection is unavailable. This is the same operating logic that underwrites independent steroid and recreational-drug testing labs across Europe.

For context on how Janoshik fits into the broader testing market, see Peptigrity's deep dive on independent peptide testing labs and the pillar guide on where to get third-party tested peptides.

What does Janoshik actually test, and how?

Janoshik's core test for peptides is HPLC purity analysis, which measures the percentage of the named compound in a sample versus impurities; pharmaceutical-grade purity is ≥98%. For identity confirmation, Janoshik offers LC-MS or GC-MS as an add-on, which measures molecular weight to verify the molecule matches the named compound. Additional services include sterility testing, endotoxin (LAL) analysis, heavy metals screening, and a popular GLP-1 blind test that identifies semaglutide, tirzepatide, or retatrutide without the buyer having to declare which compound is suspected to be in the vial.

The test catalog reflects what the peptide market actually demands. Counterfeit GLP-1s are the highest-stakes identity problem in the current peptide marketplace — semaglutide, tirzepatide, and retatrutide are routinely substituted for one another, and pharmacy-grade pens are sometimes refilled with mislabeled material. The blind test addresses this directly. For non-GLP-1 peptides — BPC-157, TB-500, GHK-Cu, and the rest of the research catalog — the standard configuration is HPLC purity plus LC-MS identity, ordered together at the time of submission.

Janoshik's main test types and what they confirm

Pricing is approximate based on Janoshik's published catalog as of April 2026; verify current prices on janoshik.com before ordering.

HPLC vs LC-MS — why both matter for peptides

HPLC testing separates a peptide sample by polarity and reports purity as a percentage — the main peak area divided by total peak area. A pharmaceutical-grade sample reads ≥98%. HPLC cannot, on its own, prove the main peak is the peptide on the label. A 99.5%-pure sample of the wrong peptide still reports 99.5% on HPLC.

That is the job of mass spectrometry for peptides. LC-MS or GC-MS measures molecular weight in daltons and compares the observed value against the theoretical molecular weight of the named compound. A match within ~1 Da confirms identity; a mismatch flags a substitution. For Janoshik specifically, LC-MS is structured as an add-on to HPLC — buyers who order only HPLC receive a purity number without an identity confirmation, which is meaningful only for samples where identity is already established (a pharmacy-sourced product with batch tracking, for example). For research-vendor samples where identity is the primary concern, the HPLC + LC-MS bundle is the operationally complete configuration.

The GLP-1 blind test — Janoshik's most popular product

The GLP-1 blind test is a single test that identifies semaglutide, tirzepatide, or retatrutide in a sample without the buyer pre-declaring which compound is suspected. The buyer ships the vial; Janoshik runs the analysis; the report names the peptide present, quantifies the amount in the vial, and reports purity. If the vial contains a mixture of two or more of the three compounds, the report covers all components.

The practical case for the blind test is straightforward. Counterfeit pens labeled "Ozempic" sometimes contain compounded tirzepatide or compounded retatrutide instead of semaglutide. A blind test catches the substitution; a non-blind test (where the buyer declares "this is semaglutide, please test purity") may not, because the analyst's HPLC method may be calibrated for the declared compound. For high-stakes vials — expensive, scarce, or sourced from a vendor whose reliability is uncertain — the blind test is the analytically rigorous choice. It currently sits at the top of Janoshik's published most-popular tests for that reason. The product page on janoshik.com documents the methodology and what the report includes.

Is Janoshik ISO/IEC 17025 accredited?

No. Janoshik does not currently hold ISO/IEC 17025 accreditation, which is the international standard for testing-laboratory competence used by regulatory and forensic labs. This is a documented limitation that some critics raise, and it is worth being clear about what it means in practice and what it doesn't.

ISO/IEC 17025 accreditation requires documented quality management systems, traceability of measurements to national standards, regular audit of analytical methods, and validation procedures for every reported result. It is the standard for labs that submit results to regulators (FDA, EMA), labs that handle forensic evidence for prosecutions, and labs that perform pharmaceutical-grade quality control. It is not the standard for harm-reduction analytical services, none of which — Janoshik included — currently operate under ISO/IEC 17025 in the consumer-peptide-testing market.

The practical implication for buyers: if you need a COA for regulatory submission, pharmaceutical compounding documentation, or legal proceedings, Janoshik is not the appropriate lab. If you need independent verification that the peptide vial in front of you contains what the vendor claims at the purity claimed, Janoshik is the most-referenced and most-trusted option in the research-peptide community, and the absence of formal accreditation does not change the analytical chemistry of an HPLC run or an LC-MS measurement. The methods are the same; the audit framework is different. For a deeper discussion of what this means for buyer verification, see Peptigrity's pharmaceutical-grade purity standards explainer.

How much does Janoshik testing cost and how long does it take?

Janoshik's pricing for the most common configuration — HPLC purity + LC-MS identity for a single peptide vial — typically falls in the $85–$130 range, with shipping from the US adding $40–$75 depending on carrier and speed. Standard turnaround is 5–15 business days after the lab receives the sample. Expedited testing is available for a 100% surcharge of the test value, moving the sample to the front of the queue; expedited service must be arranged before the sample arrives at the lab.

The total cost for a US buyer running a single HPLC + LC-MS test on a peptide vial — including international shipping — sits in the $125–$205 range, which is materially higher than the equivalent test at a US-based lab. The premium reflects the international shipping leg and the depth of Janoshik's public COA archive, which is the operational asset US-based labs cannot match. Buyers who triangulate (US lab for routine batch verification, Janoshik for samples where identity is genuinely in question) typically conclude the premium is justified for the second use case and not the first.

Total cost of a single Janoshik peptide test (HPLC + MS, US-origin sample)

For buyers planning to send their own peptides for testing, the step-by-step independent testing guide covers the full operational workflow including packaging, customs declaration, and how to handle the Janoshik order confirmation.

Why FedEx and UPS are the recommended carriers

FedEx and UPS handle the EU import customs and clearance fees on Janoshik-bound shipments, which means the buyer pays one shipping fee at dispatch and faces no surprise customs charge or delay on the Czech receiving end. USPS, Royal Mail, Deutsche Post, and Australia Post do not handle EU customs the same way — packages can sit in Czech customs for days or weeks awaiting clearance, and additional fees may be assessed on arrival. For sample shipping where transit time and predictability matter, FedEx and UPS are operationally the right choice even at a higher base shipping rate.

Can you pay Janoshik with cryptocurrency?

Yes. Janoshik accepts credit and debit cards (Visa, MasterCard, American Express), Google Pay, Apple Pay, traditional bank transfer, and three cryptocurrencies — Bitcoin, USDT, and USDC (the latter two via the Ethereum network). Privacy-conscious buyers commonly use crypto to keep the payment trail off card statements, particularly in jurisdictions where research-peptide purchase records on credit cards have created downstream regulatory friction.

How do you send a peptide sample to Janoshik?

Sending a sample to Janoshik is a five-step process: place the order on janoshik.com, receive shipping instructions (including the current Czech address) by email, package the sample (one vial or ~1 mg of lyophilized peptide, sealed, in original packaging if possible), ship via FedEx or UPS with the order number on the customs declaration, and enter the tracking number on the order confirmation page. Janoshik provides a Task number once the sample arrives, and the COA arrives by email and through the customer's janoshik.com account 5–15 business days after analysis begins.

Step-by-step — what to put in the package and what to write on the customs form

The packaging is straightforward and the customs declaration is where most buyers get tripped up. Send one vial or one sealed package of peptide per test ordered. For lyophilized peptide, ambient-temperature shipping is acceptable; ice packs are not required for stability over the 3–7 day transit window. For reconstituted peptide solutions, cold-chain packaging is recommended, but most buyers test lyophilized stock rather than working solutions for this reason.

On the customs form, declare the contents as a research chemical sample for analysis, not as a "peptide" or "pharmaceutical product." Declared value should be modest — $20–$50 typically — reflecting the fact that the sample is being analyzed, not sold. Include the Janoshik order number on the customs declaration so the lab can match the sample to the paid order. Janoshik's post-order email contains the current shipping address; do not pre-print or guess an address from older forum posts, because the operating address may change and the email contains the live current detail. The lab does not publicly publish its shipping address on the open web, which is operationally normal for an analytical lab and reduces unsolicited or test-purpose sample shipments.

What you receive back: the digital COA + Task number

The output is a digital Certificate of Analysis delivered by email and saved to the customer's janoshik.com account. The COA includes the test methods used (HPLC, LC-MS, etc.), the purity figure as a percentage, the molecular weight measurement (if MS was ordered), the test date, the client name (the customer who ordered the test), and a Task number that uniquely identifies the report. The Task number is the verification anchor — it is what makes the COA verifiable later by anyone who needs to confirm the document is authentic.

International shipping — does it work from the US, UK, Australia, EU?

Yes — Janoshik routinely receives samples from the US, UK, Australia, Canada, and EU member states. Intra-EU shipping faces no customs interaction at all under EU free movement of goods; a buyer in Germany or Spain ships within the single market with no border process. US, UK, AU, and Canadian buyers ship across an international border into the EU; FedEx and UPS handle the import customs into Czechia. Customs delays at the EU side are uncommon when FedEx or UPS is the carrier, and the lab does not require pre-import paperwork or licensing from the buyer's side.

How do you verify a Janoshik COA is real?

Every legitimate Janoshik COA includes a Task number printed on the document. To verify the certificate, enter the Task number on the verification portal at janoshik.com, and the site returns the archived report — same purity figure, same MS spectrum (if MS was ordered), same test date, same client name. If the Task number does not resolve on Janoshik's portal, or resolves to a different compound or client name, the COA has been altered, photoshopped, or recycled from another sample. This portal-verification step is what makes Janoshik COAs forgery-resistant in a way that PDF documents alone are not.

The verification is public and requires no vendor permission. A buyer presented with a "Janoshik tested" claim by a peptide vendor can independently confirm the COA by entering the Task number — there is no gated access, no login required, no subscription. This is the operational feature that has made Janoshik the community-default verification source: the audit is in the buyer's hands, not the vendor's. The general patterns to watch for when reading any peptide COA are covered in COA red flags and the deep-dive on how to read HPLC and mass spec results.

What to do if a vendor refuses to share the Task number

Treat refusal to share the Task number as a red flag. The Task number is not sensitive information — it is the public key to a public archive. A vendor that publishes a COA image on a product page but refuses to provide the Task number when asked has either copied the COA from another source, modified it, or is using it as decoration without an underlying real test. Without the Task number you cannot verify the COA, regardless of how legitimate the document looks. This applies equally to other independent labs with verification portals — Chromate, MZ Biolabs, TrustPointe, Freedom Diagnostics — each of which uses an analogous lookup code.

When the client name on the COA doesn't match the vendor selling you the peptide

A common scenario: the COA lists "Wholesaler X" or "Distributor Y" as the client, but the retail vendor selling you the peptide is a different entity. This may or may not be a problem. If the batch number on the vial matches the batch number on the COA, the vendor is selling from the tested batch — the upstream wholesaler tested the batch, and the retail vendor is simply reselling from that same lot. If the batch numbers do not match, the COA is decorative — it documents some other batch from some other supply chain, and provides no information about the vial in front of you. The batch-match check is the cleanest way to distinguish meaningful third-party testing from COA-as-marketing.

How does Janoshik compare to US-based testing labs?

For US-based buyers, the practical alternative to Janoshik is one of four US-based independent labs: Chromate Analytics, MZ Biolabs, TrustPointe, or Freedom Diagnostics. Several other independent labs operate in adjacent jurisdictions — Bioregen, Bioviridian, Horizon Analytical, Lab4Tox, and Analiza Białek — each with profile pages in Peptigrity's testing labs directory. The trade-off comes down to three variables: cost (US labs save the $40–$75 international shipping), turnaround (US labs save the 3–5 days each way), and community reference depth (Janoshik's Task-number archive is the deepest public COA database in the peptide community). For routine batch verification, the US labs are more practical; for high-stakes identity confirmation, Janoshik remains the most-referenced.

Janoshik vs the major US-based independent labs

Why some buyers triangulate

Buyers who run repeat testing on the same compound across multiple suppliers commonly use a two-lab strategy. Routine batch verification — same vendor, same compound, periodic re-testing to confirm the vendor is maintaining quality — goes to a US lab for cost and turnaround reasons. High-stakes identity confirmation — a new vendor whose claims you don't yet trust, a suspected counterfeit GLP-1, a vial from a discontinued shop with unclear provenance — goes to Janoshik because the public Task-number archive lets future buyers reference the same result, and because Janoshik's reputation in the community lends additional weight to the finding.

For full context on choosing between labs and where each fits in the broader testing market, see the pillar on where to get third-party tested peptides. Profile pages for adjacent labs — Bioregen, Bioviridian, Horizon Analytical, Lab4Tox, and Analiza Białek — are listed alongside the major five in the testing-labs directory.

Frequently Asked Questions

Is Janoshik testing legit?

Yes. Janoshik is a real, operating analytical laboratory in the Czech Republic, founded by Peter Magic, with a public verification portal and a track record dating to before the recent peptide-market boom. The founder appeared on a long-form interview with Derek of More Plates More Dates in April 2026, on camera and identifiable, discussing the lab's testing methodology and operational stance. Janoshik is the most-referenced independent peptide testing service in the English-speaking research-peptide community. The lab does not hold formal ISO/IEC 17025 accreditation, but neither do its main consumer-testing peers — that is a feature of the harm-reduction analytical category, not a Janoshik-specific limitation.

Where exactly is Janoshik's address?

Janoshik does not publicly publish its shipping address on the open web. The address is provided to customers in the post-order email after a test is purchased on janoshik.com, which is operationally normal for an analytical lab. This reduces unsolicited sample shipments, prevents test-purpose sample submissions from anonymous senders, and gives the lab control over receiving logistics. Do not guess the address from older forum posts — use the address provided in your specific order's confirmation email.

Can I visit Janoshik's lab in person?

No. Janoshik operates as a sample-receiving laboratory; in-person visits are not part of the standard customer flow. Samples are submitted by mail (FedEx and UPS preferred), results are returned digitally via email and the customer's janoshik.com account. The Czech facility is not a walk-in storefront.

How long has Janoshik been operating?

Janoshik has been operating since the mid-to-late 2010s as a harm-reduction analytical service. The Task-number COA archive on janoshik.com extends back several years, which is the practical depth most buyers care about when verifying older COAs that vendors still circulate. Peter Magic discusses the lab's evolution in the April 2026 interview but does not foreground a specific incorporation date as part of the lab's marketing.

What's the difference between Janoshik, Janoshik Analytical, and Janoshik Labs?

They refer to the same entity. Janoshik Analytical is the formal operational name; Janoshik Labs is colloquial; Janoshik Analytics appears on some vendor sites as a slight rephrasing. The single operating domain is janoshik.com, and the Task-number verification system is the same regardless of which name appears in any particular vendor's marketing copy.

Can Janoshik test FDA-approved drugs like Ozempic or Mounjaro?

Yes. The GLP-1 blind test specifically covers semaglutide, tirzepatide, and retatrutide, including testing of suspected counterfeit pens and compounded vials. Janoshik will identify the compound and quantify the amount in the vial regardless of whether the source is FDA-approved (Ozempic, Wegovy, Mounjaro, Zepbound) or research-grade. The lab's Czech jurisdiction places it outside FDA enforcement, which is why this kind of testing is operationally available in a way it would not be at a US-based lab handling the same samples.

Does Janoshik share results with regulators or law enforcement?

Janoshik operates as a harm-reduction lab. Its public stance is that customer test data is private — samples are tested for the customer's own information, results are returned to the customer, and the lab does not share data with regulators or law enforcement. This is the same operating model used by independent harm-reduction testing services for steroids and recreational drugs across Europe, and it is the reason the harm-reduction category exists as distinct from regulatory and forensic labs.

This article is for educational and informational purposes only. Peptigrity is an independent peptide review platform that maintains a testing labs directory including a Janoshik lab profile; we do not sell peptides, do not take affiliate commissions from any vendor, and have no commercial relationship with Janoshik Analytical or any other testing laboratory. Most peptides referenced on this site are not FDA-approved for human use; regulatory status varies by country and changes frequently. Always consult a qualified healthcare provider before using any peptide or research compound.