Batch number

A certificate reports on a sample from a specific batch. Without a batch number on both the certificate and the vial, there is no way to know whether the test describes what you have. That reduces the certificate to a graphic.

This is why our vendor directory records whether a seller publishes batch numbers. It is a checkable fact about how they operate, unlike a claim about what is in their product.

It also matters if something goes wrong. A dose history that records which batch it came from can answer a question that a history recording only the compound cannot.