1, Vitamins: Vitamin C is the most abundant in green tea, which has many effects on human body, can prevent scurvy, increase resistance, and also has the functions of adjuvant anti-cancer and prevention of arteriosclerosis. Usually 100g of tea contains 100 ~ 500mg of vitamin C, which is much higher than that of lemon, pineapple, tomato, orange and other fruits. The daily demand for vitamin C is about 60 mg. If a person drinks 3 ~ 5g of tea every day, it can basically meet the needs of the human body. In addition, green tea also contains higher vitamins A, D, E, K and so on. According to the determination, the content of vitamin A in green tea is more than that in carrot. The content of vitamin E is as high as 50 ~ 70 mg100g, which is much higher than that of ordinary fruits and vegetables. These vitamins are very important for normal hair. For example, vitamin E can promote the normal development of human reproductive function and has anti-aging effect.
2. Minerals: Green tea contains 4% ~ 7% inorganic substances, most of which can be dissolved in hot water and used by human body. Among them, potassium accounts for 50%, phosphorus accounts for 15%, followed by calcium, iron, manganese, aluminum, zinc, sodium, boron, sulfur and fluorine. These inorganic salts are of great significance for maintaining human balance. For example, potassium is the main component of intracellular fluid, especially young people, who have a large amount of activity, especially sweating in summer, which is easy to cause potassium deficiency in human cells and cause weakness. In addition, the role of various trace elements can not be ignored. For example, fluoride can protect teeth and prevent dental caries. 100g of tea contains fluorine10 ~15mg, of which 80% is soluble in tea soup and absorbed by human body. Others, such as manganese, can prevent reproductive dysfunction and convulsions; Zinc can promote the growth and development of children and prevent myocardial infarction; Iron can enhance hematopoietic function and prevent anemia.
3. There are three substances necessary for human metabolism: protein in tea is not much, but protein is composed of amino acids, while tea contains 2% ~ 4% amino acids and tender green tea is about 5%, and there are many kinds of amino acids, which are very beneficial to human body. Especially theanine, is unique to tea. Others such as lysine, cystine, cysteine, aspartic acid, histidine and arginine play an important role in preventing premature aging, promoting growth and intellectual development, and enhancing hematopoietic function.
In addition, teenagers have strong endocrine, and people who usually like smoking and drinking are prone to get angry, which often leads to constipation and sores on the lips. Green tea has the effect of clearing away heat and reducing fire. Green tea is not fermented, it is cold. It has diuretic effect: it promotes urination and promotes urination. It can expel "heat toxin" from the body, and achieve the purposes of promoting digestion, resolving phlegm, clearing away heat and reducing fire. For teenagers who often surf the Internet, green tea is the best anti-radiation drink. For young girls who love beauty, green tea contains powerful antioxidants, tea polyphenols and vitamin C, which can not only remove excess free radicals in the body, but also make the spleen secrete hormones against stress. Regular drinking can make the skin shiny, delicate and fair.
Of course, teenagers can also choose to drink different kinds of tea according to different seasons. In a word, teenagers' drinking tea is conducive to their healthy physical and mental growth, and they also hope that teenagers "don't smoke, drink less, learn to drink tea, drink more tea, drink good tea and talk about art". (Nakamura in the tea ceremony)
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