Janoshik Labs is a testing laboratory in Europe, Czech Republic listed on Peptigrity. 2840 certificates on file attributed to this lab, most recent 2026-10-26; 65 distinct compounds tested; 136 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 2026-11-05.
Independent Czech lab with a large public catalogue for peptides, blends and related compounds.
Certificates from 136 different shops are on file here — 2,840 tests in all. How groups are set →
Average purity is of the samples Janoshik Labs received from buyers and vendors. It describes those products, not the lab.
Turnaround
on file, unconfirmed — the lab’s figure; Peptigrity doesn’t verify it. A median appears once 5 people who ordered a test themselves have reported the dates.
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Independent HPLC analytical laboratory in the Czech Republic providing peptide purity, potency, and identity testing with public COA verification for individual and commercial clients.
us based, shipped to prague anyway because of the reputation. transit was 6 days which is on me and usps. lab turnaround was 2 days. reta 98.2 percent, 10.1 mg. the report is cleaner than anything i have got from a domestic lab and the qr verification means i can post it without people calling it photoshopped. would send again
sema came back 91.4 percent with a visible impurity peak. not what i wanted to see. asked what the second peak likely was and got an actual explanation back, not a form letter. im annoyed at the vial, not the lab. took the report to the vendor and got a refund. this is why you test. jano did the part i paid them for
First time sending anything to a lab. Posted from Sweden, arrived Prague in 3 days, report in under 48h after that. Tirz 99.0%, 10.3 mg. Checked the verification link, saved the PDF, finally stopped refreshing my inbox 😅
Fastest I've used. 2 days. 98.7%. Verify QR works!!
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