... , we can supply all the specifications of Green tea extract powder. 1. Polyphenols 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 95%, ... 65%, 70%, 75%, 80%, 90% HPLC 3. EGCG 10%, 15%, 20%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 70%, 80%, 90%, 95 ... . For example, Polyphenols 95%+Catechins 70%+EGCG 40%+Caffeine 5% Specification Sheet Product Name:Green Tea Extract PowderUsed Part:LeafModel No.:GRTSupplier:Hangzhou ...