Ito En Sencha Shot contains 152 mg per 6.4 fluid ounce of the powerful antioxidant called catechin. They are five times (5X) the amount of catechin tea antioxidants per serving. Sencha is the standard term for quality green tea in Japan, with approximately 80% of all tea produced in Japan being this variety. SEN means to brew, steep, or boil a mixture of medicine or a healing drink. CHA is the Japanese/Chinese word for tea/ since tea was originally used as a medicine, it was called sencha.