Tea has a good medical effect. In the Tang Dynasty, there was the word "tea medicine" (see "tea medicine" engraved in the fourteenth year of Daiguo). In Song Dynasty, Lin Hong's book "Shanjia Qing Palace" also concluded that "tea is medicine".

Tea has at least the following functions:

(1) Less sleep; (2) soothe the nerves; (3) improving eyesight; (4) Clear leadership; (5) quenching thirst and promoting fluid production; (6) clearing heat; (7) summer heat; (8) detoxification; (9) digestion; (10) sober up; (1 1) lose weight; (12) Xia Qi; (13) Lishui; (14) catharsis; (15) Treating dysentery; (16) Eliminating phlegm; (17) expelling wind to relieve exterior syndrome; (18) Strong teeth; (19) Treating heartache; (20) treating sores and fistulas; (2 1) cure hunger; (22) Yiqi Li; (23) prolong life; (24) sterilization of beriberi. [22]

The other functions of tea are not systematic, and there are the following: "Talking about Things" says: "Burning cigarettes can repel mosquitoes: gladiolus raw pill spots, Leng Cha, sesame oil sprinkled on leaves." "Help me" said: "The mouth is rotten, and the tea roots are boiled." Compendium of Materia Medica: To cure acne itching, it is advisable to burn tea and cigarettes in the room.

Cancer prevention: making tea in a pot is more beneficial to health. Compared with simply making tea in a cup filled with boiling water, this method of making tea can release more anticancer chemicals.

Disease prevention: black tea has strong antibacterial ability. Gargling with black tea can prevent colds caused by viral diseases, prevent tooth decay and food poisoning, and reduce blood sugar and hypertension. Studies have shown that black tea is as effective as green tea and is more beneficial to the heart.