Can prevent cardiovascular diseases. Drinking tea can prevent dental caries. Drinking tea soup brewed with10g of tea every day can meet the human body's demand for fluorine. Tea with high fluorine content includes Fujian oolong tea, Yunnan tea, Yunnan black tea, Zhejiang tea, Jiangxi jasmine tea and Guizhou brick tea. The efficacy of various teas: black tea: people who exercise a lot, people who consume a lot of physical strength, and people who want to live longer. Green tea: people with little exercise and labor, addicts and alcoholics, lose weight, reduce blood fat, prevent arteriosclerosis, people with high work pressure, and fight cancer. Scented tea: those who use their brains too much, those who are deficient in spleen and stomach, and those who work less. Oolong tea: meat eaters, people after exercise, weight loss and beauty. Honey tea: constipation. Pu 'er tea: slimming and beauty. Women with the following diseases should not drink tea. Suffering from neurasthenia, insomnia, hyperthyroidism, tuberculosis and other chronic diseases, fever, gastric and duodenal ulcers, heart disease and so on. Lactation and pregnant women should not drink tea.