Partner Testing Labs

Finnrick works with several independent analytical laboratories to test peptide samples we list on the site. Each lab uses its own validated analytical workflow, instrumentation, and reporting conventions.

To improve transparency, Finnrick asked participating labs to answer a short methodology questionnaire covering topics such as calibration, sample preparation, quantification method, and stated uncertainty. Their responses are published below so readers can better understand how each lab generates its results.

Finnrick does not assume that any single lab represents a ground truth. Instead, we evaluate laboratory performance empirically by analyzing large numbers of overlapping tests — cases where multiple labs analyze samples from the same batch. By examining distributions across hundreds of such comparisons, we can estimate whether a lab tends to report systematically higher or lower quantities, and whether its results are consistent relative to peers.

The goal of this page is therefore not to rank laboratories, but to provide context:

• How each lab says it performs its measurements
• How those measurements compare to other labs in practice
• How Finnrick evaluates lab performance using aggregated data