Tang Dynasty Liu Zhenliang expressed the benefits of tea drinking as "ten virtues" ;: Use tea to dissipate qi, dispel sleepiness, use tea to nourish vitality, use tea to eliminate sickness, use tea to benefit the benevolence, use tea to show respect, taste with tea, use tea to do the way, and use tea to make elegance.

　　 According to analysis, tea contains more than 300 chemical components, such as protein, Fats, amino acids, carbohydrates, vitamins and tea polyphenols, tea elements, aromatic oils, lipopolysaccharides, etc., are all important nutrients and medicinal substances that are indispensable to the human body and have various functions. Some of the ingredients in the middle are actually a broad category. For example, tea polyphenols include more than 30 phenolic substances; vitamins can be specifically divided into more than 10 ingredients such as vitamins and inositol. As for the role of tea in preventing and curing diseases, there are many records in ancient Chinese books, and they are also recognized by the medical circles at home and abroad. For example, tea has varying degrees of efficacy in the prevention and treatment of dysentery, gastroenteritis, nephritis, hepatitis, diabetes, hypertension, arteriosclerosis, coronary heart disease, cancer, leukopenia and radiation damage. For example, the anti-cancer effect of tea, especially green tea, according to the survey in Shizuoka Prefecture, Japan, found that the incidence and mortality of cancer in tea areas, especially green tea producing areas, are significantly lower than other places. It is now basically clear that the anti-cancer ingredients in tea are mainly catechins; this ingredient is about 15%-20% in green tea. In addition, the vitamins C and E contained in tea also have certain anti-cancer auxiliary effects. Probably because of this, tea has various praises abroad such as "safe drink", "health drink", "healthy and longevity drink" and so on.

　　"Drinking Tea Health and Herbal Tea" led by Han Bin and Korean In the book "Secret prescriptions for treatment of diseases", in the section "The Understanding and Application of Tea in Modern Medicine", 31 functions of tea are listed: digestion; refreshing and refreshing; prolonging life; lowering blood lipids and losing weight; improving eyesight; diuresis Anti-swelling; anti-bacterial and anti-inflammatory; anti-arteriosclerosis; lowering blood pressure and preventing hypertension; preventing and treating coronary heart disease; anti-radiation, such as TV radiation; soothing, sedating, and tempering temperament; nutrient; treating diabetes; beauty effect; preventing and treating anemia; Anti-fatigue and anti-fatigue effects; sober up alcohol and alcohol toxins; infusion and thirst quenching; anti-cancer and anti-cancer; replenishing qi and strengthening; antibacterial and antidiarrheal; detoxification; increasing the adaptability of the human body; anti-tuberculosis; removing peculiar smell and eliminating bad breath; Elevate white blood cells, treat leukopenia; anti-virus; protect teeth; adjust the acid-base balance of body fluids; externally used for anti-inflammatory, anti-bacterial, etc.

　　Tea is a good beverage for physical and mental health with very few side effects. But modern science tells us that long-term excessive drinking of tea is not good for health. Drink tea in moderation. People with cold stomach should not drink too much tea, especially green tea, otherwise it will be "exacerbated by the situation", which will cause gastrointestinal discomfort. For neurasthenia and people suffering from insomnia, it is not advisable to drink tea before sleep, let alone drink thick Tea, otherwise it will aggravate insomnia; another example, tea eye drops should not be used in general, so as not to reduce the efficacy of the drug, women who are breastfeeding should also drink less tea, because tea has astringent effect on breast milk.

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