Standard Method Performance Requirements for Determination of Catechins, Methyl Xanthines, Theaflavins, and Theanine in Tea (Camellia sinensis) Dietary Ingredients and Supplements.

The article offers information on the Standard Method Performance Requirements (SMPRs®) by the Association of Official Analytical Chemists (AOAC) for identification of methyl xanthines, theaflavins, and catechins in tea (Camellia sinensis) dietary supplements and ingredients. Topics mentioned include the importance of tea dietary ingredients, the chemical structures for catechins and theaflavins, and the green tea analysis.