A COA, or Certificate of Analysis, records the tests performed on an identified sample and the results obtained. It may include measured concentrations, analytical methods and a sample or batch number. On its own, it does not prove effectiveness, complete safety or suitability for everyone.
The useful question is whether the document supports the conclusion you want to draw. Start with the sample and batch, then read the dates, units and testing scope. This guide explains how to connect those details without filling gaps with assumptions.
What does a Certificate of Analysis contain?
A COA brings together identification, testing and results. Look for the laboratory name, report reference, sample description and any batch or lot number. Then find the individual tests, methods, units, reported values and acceptance criteria.
The World Health Organization’s model certificate describes these elements for pharmaceutical starting materials and finished products. It provides useful context for
