... %, 45%, 50%, 55%, 60%, 70%, 80%, 90%, 95% HPLC 4. Caffeine 1%, 5%, 8% HPLC All combinations for Polyphenols, Catechins, EGCG ... , Caffeine. For example, Polyphenols 95%+Catechins 70%+EGCG 40%+Caffeine 5% Specification Sheet Product Name:Green ... %Catechins by HPLC> 70.0%EGCG by HPLC> 40.0%Caffeine by HPLC< 5.0%Total Plate Count< 1,000cfu/GYeast ...