Peptidetesting

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Janoshik Analytical

janoshik.com

Independent lab widely used to check the purity of peptides and similar products; offers anonymous testing for private buyers.

Substantiated from four separately substantiated review fields. See why

Several independent public sources agree on who runs this lab and how its reports can be checked.

What it does not mean: this is not a verdict on measurement quality, on any single certificate, or on the safety of a product.

Can I get tested here?

To the website: janoshik.com
Order acceptance
Accepts private orders
Indicative price
≈ $145-$500 per peptide test · estimated from the lab’s website
Location
Praha, Czechia EU Europe · Kaprova 42/14, 110 00 Praha - Staré Město

How to get a peptide tested

Why we say this

The overall assessment is not an average of these four fields. Each field answers a different question and cannot offset another.

Substantiated

Who is behind the laboratory?

A responsible legal entity and its leadership or operator are publicly substantiated.

Boundary: Identity and responsibility do not establish analytical competence.

View 4 signals and their evidence
Signal profile - Counts show composition, not a score. Core evidence 2 Supporting evidence 2 Boundary 0 Contradiction 0
  • Positive Janoshik s.r.o. is registered in the Czech Commercial Register (Obchodní rejstřík) under registration number (IČO) 17668727.
  • Positive At least one named key person is independently attributed to this laboratory: Peter Magic.
  • Positive The registered address Kaprova 42/14, 110 00 Praha - Staré Město is confirmed by Městský soud v Praze (Municipal Court in Prague).
  • Positive Peter Magic identified as founder/owner/CEO across multiple independent sources including The Guardian, peptide-industry sites with interview content, and a podcast. Lab founded ~2012-2013, indicating ~12-14 years of activity. Described as 'a chemist at Janoshik Analytical' by The Guardian and as 'analytical chemist based in the Czech Republic' by Peptigrity. However, no formal chemistry degree or professional registration is documented.
Partially substantiated

Is the procedure technically substantiated for peptides?

Specific method or process evidence exists, but the full method-by-matrix contract is not public.

Boundary: Lack of accreditation is normal here and is not a negative signal.

View 5 signals and their evidence
Signal profile - Counts show composition, not a score. Core evidence 0 Supporting evidence 3 Boundary 2 Contradiction 0
  • Positive The laboratory holds no accreditation and claims none. Absence of accreditation is the norm for a lab that accepts private samples; the honest statement of it is a signal.
  • Positive The Janoshik public tests database lists entry #163533 as 'Blind common anabolic steroid screening - oils,' indicating that samples can be submitted without vendor identification. The public tests page is accessible at public.janoshik.com.
  • Positive 1.4% of the 208 reports in our corpus carry an endotoxin/LAL or sterility figure - the parameter that matters for anything injected.
  • Positive The laboratory names concrete instrumentation: HPLC, MS.
  • Neutral No verifiable accreditation. For a laboratory that accepts private samples this is the norm, not a mark against it.
Report confirmed Verification tested

Can a report be traced back through the issuer?

A specific report completed a laboratory-controlled issuer round trip. Starting from a real certificate of this laboratory, we followed the verification route printed on it back to the issuer, and it worked.

Boundary: Report confirmation establishes neither analytical competence nor the contents of an individual vial.

View 3 signals and their evidence
Signal profile - Counts show composition, not a score. Core evidence 1 Supporting evidence 2 Boundary 0 Contradiction 0
Method
task number + unique key
Verification path
https://janoshik.com/verification/
Public registry
https://public.janoshik.com/
  • Positive Starting from a real certificate of this laboratory, its printed verification route was followed back to the issuer and it worked. The route is proven in use, not merely offered. This is evidence of report governance, not analytical competence.
  • Positive The laboratory operates a public registry of released reports: anyone can browse what it issued, not merely check a report they already hold.
  • Positive Janoshik operates a QR verification system at verify.janoshik.com and public.janoshik.com designed to catch forgeries of its Certificates of Analysis, addressing forged COAs issued in the lab's name [8][9][15].
Not publicly established

Has actual measurement performance been checked externally?

No suitable independent evidence of actual measurement performance was publicly established.

Boundary: Testimonials, report volume and average purity values are not external performance evidence.

No public signals in this review field.

Read our full reasoning

Reports from Janoshik Analytical carry workable verification signals: the issuer is a verified legal entity, its verification route was followed back from a real certificate and worked, and named leadership is independently attributed. These signals do not establish a final verdict on every report.

How is Janoshik Analytical identified?

Janoshik s.r.o. is registered in the Czech Commercial Register under IČO 17668727 since October 2022, with a confirmed physical address at Kaprova 42/14, Praha. Founder and CEO Peter Magic is identified across independent sources including The Guardian and industry interviews, with approximately 12-14 years of activity. The domain janoshik.com has been registered since February 2016.

How does the verification route work?

The laboratory operates a proven verification portal at verify.janoshik.com and public.janoshik.com: starting from a real certificate, the printed verification route was followed back to the issuer and it functioned. This is evidence of report governance. The site lists peptide testing including GLP-1 peptides (Semaglutide, Tirzepatide, Retatrutide) and HGH analysis, names concrete instrumentation (HPLC, mass spectrometry), publishes prices, and accepts private orders worldwide. Community sources describe the lab as a respected gray-market peptide testing provider, and an independent audit of 200 public reports concluded it is a real EU third-party lab.

What are the limits of the evidence?

The lab holds no ISO/IEC 17025 accreditation and claims none, which is the norm for a lab accepting private samples. No formal chemistry degree or professional registration is documented for named personnel. Documents bearing this issuer name were observed on 41 vendor domains, which is distribution context, not evidence of quality or authenticity.

How should you read the result?

These are signals, not a verdict. The documented findings are evidence signals about report governance and organizational identity. Community descriptions, audit findings, verification functionality, and distribution patterns should be interpreted as signals rather than a definitive verdict.

What this rests on

The material this assessment is built on.

Public information only
Registration, payment, verification
Legal entity
Janoshik s.r.o.
Registration
17668727 · 2022-10-25 (Městský soud v Praze (Municipal Court in Prague))
Payment
CardCrypto
Report verification
Reports verifiable online

People behind the lab

Peter Magic
Founder, Owner & CEO, Chemist · Founded Janoshik around 2012-2013; company formally registered as Janoshik s.r.o. on 2022-10-25
Edita Prokešová
Chief Scientific Officer (CSO)
Jakub Dobrík
Managing Director & CFO

Accreditation

ISO/IEC 17025: Not accredited ILAC Registry search via ClearBatch returns 'Not accredited' [7]. Multiple secondary sources confirm no ISO/IEC 17025 status [6, 8, 12]. The lab's own website makes no accreditation claim [17]. Vendor Chameleon Peptides falsely advertises 'ISO 17025 Accredited Laboratory' without specifying a certificate number or scope [9, 16] - this is a vendor claim, not a statement by the lab itself.

Full evidence apparatus

What is tested - and with what

Substances PeptidesSARMsAnabolic steroidsSERMsNarcotics & NPS

Techniques LC-MSChromatographyElemental analysis

Methods & capabilities HPLC · chromatographyMassenspektrometrie · spectrometry

Sources and public record

These signals describe access, the public trail and documents. They do not colour any of the four review fields.

Access and offering · 3
  • Positive Site lists 'Peptides' as a test category with specific tests: 'Common GLP-1 peptide blind test (Semaglutide, Tirzepatide and Retatrutide)' and 'Human Growth Hormone amount, purity and dimer and higher molecular weight proteins analysis'.
  • Positive The site offers individual test ordering via eshop with prices and worldwide sample acceptance.
  • Positive The laboratory publishes prices (mid).
Public and digital trail · 2
  • Positive The domain janoshik.com has been registered since February 7, 2016, via the Czech registrar Gransy, s.r.o., indicating a stable online presence of approximately 10 years.
  • Positive Community sources describe Janoshik as the "gold standard" for gray-market peptide testing and "among the most respected analytical testing laboratories," with customer reviews citing rapid turnaround and reliable service [8][10]. An independent audit of 200 public reports concluded that Janoshik is a "real EU third-party lab" operating out of the Czech Republic [9][15].
Document context · 2
  • Neutral The site has a 'Public Results' tab and a 'Verify' feature for report authenticity.
  • Neutral Documents bearing this issuer name were observed on 41 distinct vendor domains (208 reports in the corpus). This is distribution context, not evidence of laboratory quality or document authenticity.
Domain & digital trail
Domain registered
2016-02-07 (10.4 age)
Registrar
Gransy, s.r.o.
TLS
Let's Encrypt

Audit complete

Show all 102 sources

For lab operators

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Claim this lab
This profile is built from public sources and reviewed by hand. It shows where each fact comes from. A listing is a set of signals, not an endorsement or a verdict - and never a guarantee. Presence and order cannot be purchased.
Last reviewed: 2026-07-14