Flavanoid Flavanoid is also known as tannin acid, constitutes to about 20 to 30 % components of tea, there are more than 30 kinds of elements in flavanoid, most of them have medical values, they produce capillaries, prevent internal bleeding, hinder arteriosclerosis, decrease the risk of blood clotting, high blood
compressure or any coronary heart diseases, it can also kill bacteria and protecting us from cancer and is anti-radiation, etc.