茶多酚(Tea polypnehenols,TP)是儿茶素、花青素、黄酮与黄酮类和酚酸类等集于茶叶中的多酚复合物的总称。其中儿茶素占60%~80%,分为酯型儿茶素和游离型儿茶素,酯型儿茶素占儿茶素的70%左右。TP为淡黄色至褐色略带茶香的水溶液或灰白色粉状固体或晶体,有涩味,略有吸潮性。TP在 Tea polypnehenols (TP) is a general term for polyphenol complexes that are contained in tea, such as catechins, anthocyanins, flavonoids, flavonoids, and phenolic acids. Among them, catechins account for 60% to 80% and are classified into ester catechins and free catechins, and ester catechins account for about 70% of catechins. TP is a slightly yellow to brown aqueous solution of tea or an off-white powdery solid or crystal with astringent taste and slightly hygroscopicity. TP in