Tea includes green tea, black tea and oolong tea. However, it is better to drink tea mainly with green tea for a long time, because green tea has the following functions: :1. Green tea contains amino acids, phenolic derivatives, aromatic substances, vitamins, etc. The comprehensive effects of these substances, especially the comprehensive effects of tea polyphenols, catechins and vitamin C, can promote fat burning and reduce blood lipids and cholesterol. Therefore. For female friends, drinking green tea often can help digestion, reduce fat and lose weight. 2. Green tea prevents cardiovascular and cerebrovascular diseases. Tea polyphenols in green tea can dissolve fat, while vitamin C can promote cholesterol excretion. Green tea also contains chaganning, which can enhance the toughness of blood vessels. If you drink it regularly, blood vessels will not rupture easily. Therefore, drinking green tea often can reduce the risk of death from heart disease. 3, green tea delays aging In the process of human metabolism, it will produce large star free radicals, which will also hurt cells in the body. Superoxide dismutase (SOD) is a free radical scavenger, which can effectively remove excess free radicals and prevent the damage of free radicals to human body. Catechins in green tea can significantly improve the activity of superoxide dismutase and scavenge free radicals. Therefore, drinking green tea regularly can play a role in delaying aging. 4, green tea to prevent bad breath The catechins contained in green tea can effectively inhibit caries bacteria and reduce the occurrence of dental plaque and periodontitis. In addition, tannic acid in green tea has bactericidal effect, which can prevent food scraps from breeding bacteria. Therefore, drinking green tea regularly can effectively prevent bad breath. 5, green tea to improve indigestion indigestion caused by bacteria, acute diarrhea, drinking green tea can alleviate its symptoms. 6, green tea to prevent cancer The organic anticancer substances in green tea are mainly theophylline, tea polyphenols, vitamin C and vitamin E; The inorganic anticancer elements in tea are mainly selenium, molybdenum, manganese and germanium. Especially caffeine and tea polyphenols, the combined effects of them not only have refreshing and refreshing effects, but also have the functions of improving human immunity and preventing cancer. 7. Green Tea Sunscreen The catechins in green tea have strong antioxidant function. Ultraviolet rays can make the skin produce a lot of peroxide, which makes the skin rough and inelastic. If tea containing catechins is applied in advance, the content of peroxide (free radicals) in the skin will be reduced by more than 25%, so drinking green tea also has sunscreen effect. 8. Green tea protects nerve cells. Polyphenols in green tea have the function of protecting nerve cells. Polyphenols can activate the factors supporting cell survival and inhibit the factors leading to cell death and neurodegenerative diseases, thus improving the survival rate of nerve cells and reducing the damage of nerve cells caused by acidic substances. 9. Green tea lowers cholesterol. Green tea can not only prevent cardiovascular diseases, but also vitamin C in tea can reduce cholesterol deposition on blood vessel walls and expel cholesterol. 10. Green tea can prevent the flu. Green tea contains theacid. When people have the flu, theacid combines with the flu virus to reduce the infection and damage of the virus to healthy cells.