Tea have some normal nutritional composition such as protein, amino acids and some special functional active composition such as tea polyphenols, theanine, tea polysaccharide and so on. These active substances have some functional properties ,including antioxidant, anti-ageing, anticancer, reducing blood fat, reducing blood sugar, reducing blood pressure and weight loss. The effects of three varies tea(green tea, oolong tea, pu-er tea)on the characteristics and processing technology of bread and microorgani...