§ ANALYTICAL LABORATORY · INDEPENDENT● 2,428 TESTS PROCESSED · CZECH REPUBLIC
Home › Testing Labs › Janoshik Labs
◆ COMMUNITY LISTED
🔍 INDEPENDENTLY VERIFIABLE
J

Janoshik Labs

Czech Republic · 5-10 business days

Independent Czech lab with a large public catalogue for peptides, blends and related compounds.

Visit lab ↗
Tests on file
2428
Avg HPLC purity tested
99.5%
Turnaround
5-10 business days
ISO 17025
None on file
🔍
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.
Open verification portal ↗
⚠
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
  • Accreditation — see the note above.
  • 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
◆ Payments
  • Card
  • Crypto
◆ Sample requirements
  • Original sealed vial preferred
  • Extra vial for endotoxin or sterility

What they test

◆ PEPTIDE CATEGORIES TESTED · Σ = 2428
Weight Loss & Metabolic35%
Growth Hormone17%
Immune Support & Longevity12%
Tissue Repair & Healing11%
Skin, Anti-Aging & Cosmetic10%
Cognitive Enhancement & Neuroprotection8%

Tests processed

2428 total · 10 recent
Date
Peptide
Shop
Purity
Jul 2, 2026
Retatrutideezpeptides.com
99.28%
Jul 2, 2026
Cagrilintideezpeptides.com
99.95%
Jul 2, 2026
Retatrutideameano peptides
99.27%
Jul 2, 2026
TB-500ameano peptides
99.92%
Jul 2, 2026
Cagrilintideameano peptides
99.95%
Jun 24, 2026
Retatrutideameano peptides
99.68%
Jun 23, 2026
Retatrutidepeptide-lab.eu
99.47%
Jun 22, 2026
MOTS-C
99.20%
Jun 22, 2026
Melanotan II (MT-2)ameano peptides
99.94%
Jun 19, 2026
SS-31 (Elamipretide)certapeptides.com
99.63%
Show all 2428 tests →

Similar labs

3 comparable
F
freedomdiagnosticstesting.com
3611 tests processed
V
Vanguard Laboratory
766 tests processed
C
Chromate
568 tests processed

Contact information

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

Lab reviews

No reviews yet

No reviews yet

Have you submitted samples to Janoshik Labs? Share your experience — turnaround, communication and value. Rate the stars and you're done; everything else is optional.

✎ Write a review
Have peptides to test? Contact Janoshik Labs directly.
Visit lab ↗