... the 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%, 75%, 80%, 90% HPLC 3. EGCG 10%, ... 15%, 20%, 30%, 35%, 40%, 45%, 50%, 55%, ... 60%, 70%, 80%, 90%, 95% HPLC 4. Caffeine 1%, 5%, 8% HPLC All ...