Green Tea Extract Powder Specification:Polyphenols 20%-98% EGCG 10%-95%,Catechins 10%-90% Excellent quality,competitive price Product Name: Green Tea Extract PowderBotanical Name: Camellia sinensisOur Advantage ... . Full specifications, we can supply all the specifications of Green tea extract powder. 1. Polyphenols 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 95 ...