Janoshik Labs is a testing laboratory in Europe, Czech Republic listed on Peptigrity. 2556 certificates on file attributed to this lab, most recent 2026-09-02; 62 distinct compounds tested; 117 shops have published certificates from this lab. Stated turnaround: 5-10 business days. Methods stated: HPLC, LC-MS, Net content and Endotoxin. Verification portal: https://janoshik.com/verification/. Claimed by the lab: no. Figures as of 2026-09-21.
Janoshik Labs
Independent Czech lab with a large public catalogue for peptides, blends and related compounds.
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.
- 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.
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