Peptidetesting

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Janoshik Analytical

Public information only

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 them

Legal entity
Janoshik s.r.o.
Registration
17668727 · 2022-10-25 (Městský soud v Praze (Municipal Court in Prague))
Location
Praha, Czechia EU Europe · Kaprova 42/14, 110 00 Praha - Staré Město
Website
janoshik.com
Indicative price
≈ $145-$500 per peptide test · estimated from the lab’s website
Payment
CardCrypto
Report verification
Reports verifiable online
Order acceptance
Accepts private orders

Four separate review fields

Existing overall assessment: Substantiated

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

Can a report be traced back through the issuer?

A specific report completed a laboratory-controlled issuer round trip.

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 The issuer confirmed concrete report #137804 through its own verification channel. 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.

Our honest take

Reports from Janoshik Analytical can be checked against the lab's own verification portal.

The laboratory behind them is a verified legal entity with named leadership and a physical address in Prague. Janoshik s.r.o. is registered in the Czech Commercial Register under IČO 17668727, with a registered address at Kaprova 42/14, Praha, confirmed by the Municipal Court in Prague. The domain janoshik.com has been registered since February 7, 2016, via Czech registrar Gransy, s.r.o.

Founder and CEO Peter Magic is independently attributed to the laboratory by The Guardian, peptide-industry interview content, and a podcast. Edita Prokešová is listed as Chief Scientific Officer and Jakub Dobrík as Managing Director and CFO.

The lab operates a public verification portal at janoshik.com/verification/ and confirmed concrete report #137804 through that channel.

  • Peptide-specific tests include a GLP-1 blind test covering Semaglutide, Tirzepatide, and Retatrutide, and an HGH analysis covering amount, purity, and dimer/higher-molecular-weight proteins.
  • The lab names HPLC and mass spectrometry as its instrumentation.
  • A public tests database entry (#163533) demonstrates blind-submission capability.

The lab holds no ISO/IEC 17025 accreditation and claims none, which is the norm for a laboratory accepting private samples.

Community sources describe the lab as a reference point for gray-market peptide testing, and an independent audit of 200 public reports concluded it is a real EU third-party lab. The lab operates a QR verification system to catch forged certificates issued in its name.

No formal chemistry degree or professional registration is documented for Peter Magic. No concrete open concern was identified in the provided signals. These are signals, not a verdict.

Below: the material this assessment is built on.

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.

What is tested - and with what

Substances PeptidesSARMsAnabolic steroidsSERMsNarcotics & NPS

Techniques LC-MSChromatographyElemental analysis

Methods & capabilities HPLC · chromatographyMassenspektrometrie · spectrometry

Context without a quality rating

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

Audit complete

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

Sources

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