§ ANALYTICAL LABORATORY · INDEPENDENT● 1684 TESTS PROCESSED · CZECH REPUBLIC
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Janoshik Labs

Europe · CZECH REPUBLIC · ⏱ 5-10 business days

Independent analytical laboratory in Prague, Czech Republic — the most widely cited peptide testing reference in the global research community. Defining feature: `public.janoshik.com`, a public CoA verification database queryable by sample ID.

1684
Tests processed
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Tests on file
1684
Avg HPLC purity tested
99.5%
Turnaround
5-10 business days
ISO 17025 accredited
No
🔍
Independent verification available
Janoshik Labs publishes a public verification portal. Any test attributed to this lab can be looked up and confirmed directly with the lab — including tests on Peptigrity.
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No ISO/IEC 17025 accreditation on file
Janoshik Labs is not currently listed as ISO/IEC 17025 accredited — the international standard for testing and calibration laboratories. This is not unusual in the peptide testing market (most listed labs lack it). Accredited results carry more regulatory weight in formal contexts. Read about lab accreditation standards →

About Janoshik Labs

Independent HPLC analytical laboratory in the Czech Republic providing peptide purity, potency, and identity testing with public COA verification for individual and commercial clients.

What sets Janoshik Labs apart

  • ✓The peptide community's default reference lab. More peptide CoAs in circulation cite Janoshik than any other testing service worldwide — community-wide network effect means a Janoshik result is the format buyers are most accustomed to reading.
  • ✓Public, queryable CoA verification at `public.janoshik.com`. Each report is published to a public database queryable by sample ID — the original implementation of the anti-forgery model now copied by several other labs.
  • ✓Broad test menu beyond purity. Endotoxin (LAL), heavy metals, and sterility analysis are available — the safety-relevant tests that purity-only labs cannot deliver.
  • ✓Accepts samples globally — international shipping accepted from any country, including individual buyer submissions, not only vendor batch programs.
Honest disclosures
  • NOT ISO/IEC 17025 accredited — contrary to some vendor claims. Janoshik does not claim accreditation on its website, and independent reviews (peptidesrated.com, Trustpilot) confirm the lab is not accredited. Standard for the peptide testing market, but accredited results carry more regulatory weight in formal contexts (FDA, EMA, court submissions).
  • Mass spectrometry is a separate add-on, not bundled into the default HPLC purity test. A Janoshik CoA without MS confirms purity only — not identity. For complex peptides (tirzepatide, retatrutide, multi-agonists), confirm the buyer has paid for MS specifically.
  • Raw chromatographic data is available only on paid request. The public CoA shows the purity number and verification ID; the underlying chromatogram is not published by default.
  • 5–10 business day turnaround as documented; international shipping adds customs transit time for buyers outside the EU.

Lab information

Capabilities
◆ Testing methods
  • HPLC purity and potency analysis for peptides
  • GLP-1 receptor agonist blind testing for semaglutide, tirzepatide, and retatrutide
  • Human Growth Hormone amount, purity, and dimer analysis
  • Full-spectrum anabolic steroid blind screening
  • SARMs compound identification and purity testing
  • PCT drug and cutting agent analysis
  • Public COA verification portal with QR-code authentication
  • No ISO/IEC 17025 accreditation
◆ Accreditations
  • Community-listed
◆ Payments
  • Card
  • Crypto
◆ Turnaround
  • 5-10 business days

What they test

◆ PEPTIDE CATEGORIES TESTED · Σ = 1684
Weight Loss & Metabolic38%
Growth Hormone16%
Tissue Repair & Healing11%
Immune Support & Longevity11%
Skin, Anti-Aging & Cosmetic10%
Cognitive Enhancement & Neuroprotection8%

Tests processed

1684 total · 10 recent
Date
Peptide
Shop
Purity
Apr 24, 2026
CJC-1295 without DAC
99.83%
Apr 24, 2026
Pinealon
99.55%
Apr 24, 2026
TB-500
99.70%
Apr 24, 2026
Melanotan II (MT-2)
99.91%
Apr 24, 2026
BPC-157
99.87%
Apr 24, 2026
SELANK
99.53%
Apr 24, 2026
SS-31 (Elamipretide)royal-peptides.com
99.70%
Apr 17, 2026
KPV
98.51%
Apr 17, 2026
GHK-Cu
99.73%
Apr 17, 2026
EPITHALON
99.40%
Show all 1684 tests →

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Contact information

§ HOW TO REACH JANOSHIK LABS
Website
janoshik.com ↗
Order tests & submit samples
Location
Europe, Czech Republic
CZECH REPUBLIC

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