Test your peptides at Janoshik

Janoshik is an established analytical laboratory in Prague, Czech Republic, known for HPLC and mass-spectrometry testing and a public results-verification portal. Finnrick partners with the lab for independent peptide testing — every sample is analyzed on calibrated, professionally operated equipment and returned as a formal Certificate of Analysis (COA) documenting exactly what was found.

Janoshik has not yet answered our methodology questionnaire; see how our other partner labs describe their workflows and how we compare lab performance empirically.

Janoshik runs your samples through HPLC analysis, and sends back a certificate of analysis, detailing test results. Computed through your choice of Finnrick safety standards, this sample is then declared as “passing” or “failing”, depending on the answers to three critical questions:

HPLC is the standard analytical method for peptide characterization, used across research institutions and commercial labs worldwide.

Finnrick publishes results when we can establish sample provenance and have enough evidence that the sample represents the product sold by the named vendor. Published results include vendor and product details, helping customers evaluate the available evidence and encouraging better supply-chain decisions.

Results that do not meet these requirements are shared with the requester and kept outside the public record. Read how Finnrick decides which results to publish →