Drinking tea is also important

Since ancient times, "chai, rice, oil, salt, sauce and vinegar tea" is commonly known as "seven things to open the door".

According to the production process, tea can be divided into six types: green tea, black tea, yellow tea, white tea, green tea, and dark tea

Green teas are mostly non-fermented teas, such as West Lake Longjing, Nanjing Yuhua tea, Emei Zhuyeqing, Huangshan Maofeng and Xinyang Maojian; black teas are fully fermented teas, such as Anhui Qihong, Yunnan Dianhong, Guangdong Yinghong and Zhengshan Souchong.

Studies have found that there are 300-500 chemical components in tea, mainly including proteins, amino acids, carbohydrates, fats, tea polyphenols, tea polysaccharides, tea pigments, theanine, alkaloids, saponins,

Tea polyphenols Tea contains nearly 30 kinds of phenolic compounds, mainly including catechins and their oxides, which have the functions of eliminating free radicals, anti-virus, bactericidal and anti-radiation

Tea polysaccharides Tea contains monosaccharides and polysaccharides, which have good preventive and health care effects on patients with hypertension, hyperlipidemia and hyperglycemia

Theanine Theanine contained in tea can enhance memory, eliminate fatigue, calm nerves and relieve mental tension

Tea saponin is anti-inflammatory, analgesic, antihypertensive, can effectively reduce serum cholesterol, and can also sedative and antitussive, suitable for senile patients with asthma or three high

Vitamin Tea is rich in vitamins, including vitamin A, B vitamins, vitamin E, vitamin C, etc.

Minerals Tea contains selenium, which can effectively improve human immunity, prevent cancer and Keshan disease

Studies have shown that the ratio of tea and water science is 1:50, that is, generally 3 grams of tea leaves are soaked in 150 ml of hot water, and the water is poured out after 30 seconds.

But it needs to be reminded that, first of all, avoid drinking tea on an empty stomach or drinking strong tea

　　Second, avoid drinking tea at mealtimes, or immediately before and after meals

　　Third, people with kidney stones and other people should pay attention to drinking tea in moderation

　　Fourth, avoid drinking tea before going to bed

　　(The author is Song Tianli, Department of Medicine, Hubei University for Nationalities)

　　Responsible editor: Huang Xin Review: Zheng Ying