... Tea Extract Powder Specification:Polyphenols 20%-98% EGCG 10%-95%,Catechins 10%-90% Excellent quality,competitive price Product Name: Green Tea Extract PowderBotanical ... specifications of Green tea extract powder. 1. Polyphenols 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 95%, 98% UV 2. Catechins ... 10%, 15%, 20%, 25%, 30%, 40%, 50%, 60%, 65%, 70%, ...