How every batch gets tested

A certificate of analysis is only worth what the lab behind it is worth. We send a sealed vial from every production lot to Janoshik Analytical in Slovakia — an independent lab with no ownership stake in this company and no commercial reason to flatter our results.

1 · Sample pulled at fill

A vial is drawn from the finished lot, not from a separate reference batch. What the lab receives is what ships to you.

2 · HPLC purity

High-performance liquid chromatography separates the target peptide from process-related impurities and reports purity as a percentage of total peak area.

3 · Mass-spec identity

Mass spectrometry confirms the molecular weight matches the declared sequence — this is the test that catches a mislabelled or substituted compound.

4 · Fill weight

The lab weighs the lyophilised contents against the label claim. We publish the result whether it is over or under; our target is greater than 90% of label across the lot.

Our lab partner

Janoshik Analytical publishes results to a public verification URL that we do not control and cannot edit. Every report linked on this page opens on Janoshik’s own domain — if the numbers on our site ever disagreed with the numbers on theirs, theirs would be the record.

Reading a report

If the lot on your vial is not listed above, email us the number and we will send the report directly.