① Tea polyphenols: It is the general name of polyphenols in tea, and its main function is antioxidation.
② Sugar: There are monosaccharides such as glucose and fructose in tea, and disaccharides such as sucrose and maltose.
③ protein: the content is about 20%. But it is basically insoluble in tea soup.
④ Alkaloids: including theophylline, theobromine and caffeine.
⑤ Vitamins: Vitamins are necessary for the human body to maintain normal metabolic function. Tea contains more than ten kinds of water-soluble and fat-soluble vitamins.
⑥ Amino acids: The content is not high, but there are many kinds. Theanine content is the highest, followed by lysine, glutamic acid and methionine necessary for human body. Amino acids are easily soluble in water, which determines the freshness of tea soup.
⑦ Minerals: Tea contains a variety of mineral elements necessary for human body.