Each batch is reviewed for identity and purity before it is approved for sale. Here is what the testing terms on our site mean.
High-performance liquid chromatography, commonly called HPLC, separates the parts of a sample. The resulting chart helps estimate purity and identify unexpected material.
Mass analysis compares the measured molecular weight with the expected value. This provides an additional identity check for the batch.
Test results, packaging details, and batch identifiers are reviewed together. A purity percentage is one part of the quality review and should be read with the full batch information.
See our complete Product Quality Standards for details about our process and packaging checks.