Antioxidant Capacity of Black Tea Obtained Using Tyrosinase and Tannase Treatment

Black tea has a lower antioxidant capacity than other teas, such as green tea, white and oolong tea. Tannase tyrosinase can be used treatment to improve the quality of black infusion. been reported an effective way enhance activity in Meanwhile, could produce higher theaflavin content thearubigin. Research about Ready-to-Drink (RTD) preparation with addition tannase fresh leaves before pasteurization not reported. This study aimed find good combination (1 mg/ml) (111; 446; 1785 U/ml) high RTD The results showed that concentration decreased (DPPH reducing power), epicatechin (EC), epigallocatechin (EGC), gallate (EGCG) yet increased (TF)/thearubigin (TR) ratio tannase-tyrosinase treated Still, highest (1785 produces activities, gallic acid, EC, EGC commercial without tannase-treated Thus, best high-antioxidant