
01Identity
Identity.
Is it what the supplier says it is.
Every ingredient arrives with its supplier’s certificate of analysis, or COA: the supplier’s test results for that specific lot. The first thing a COA confirms is identity, that the material is the species, form, and grade on the order.
Suppliers confirm identity with methods suited to the ingredient, such as high-performance liquid chromatography (HPLC), infrared spectroscopy (FTIR), or comparison to reference samples.







