Quality & testing
Peptide purity testing, explained
"99% pure" means nothing without proof. This guide explains how peptide purity is actually measured, what a certificate of analysis contains, and the checks worth making before you order from anyone.
How purity is measured
The industry-standard method is high-performance liquid chromatography (HPLC), which separates a sample into its components and reports what fraction is the target compound. Mass spectrometry (MS) complements it by confirming the compound's molecular identity — the mass has to match the sequence being sold.
A purity number without identity confirmation is incomplete: HPLC can show a clean single peak for the wrong compound.
Reading a certificate of analysis
A usable COA states the compound name and sequence, the testing laboratory, the test date, the batch number, and the purity result — ideally with the chromatogram attached. It should be recent (the current batch, not a supplier's best batch from two years ago) and from a laboratory that does not work for the seller.
Red flags: no batch number, a stock image instead of a dated report, a missing laboratory name, or a COA for a different product than the one for sale.
Why it matters for research
Unknown impurities make results uninterpretable: if a study sample contains fillers, truncated sequences, or a different molecule entirely, whatever happens in the experiment cannot be attributed to the peptide under investigation. Purity verification is not paperwork — it is what makes research data mean anything.
Every Novera Wellness batch is independently tested to 99% purity with current batch documentation available on request before ordering.
Before you order any research peptide, ask for the current batch COA from an independent laboratory. If it is not forthcoming, order elsewhere.