1. Stimulant effect: The caffeine in tea can stimulate the central nervous system, helping people to refresh their minds, enhance thinking, relieve fatigue, and improve work efficiency.
2. Diuretic effect: The caffeine and theophylline in tea have a diuretic effect and are used to treat edema and hydropsy. The detoxifying and diuretic effects of black tea sugar water can be used to treat acute jaundice hepatitis.
3. Cardiotonic and antispasmodic effect: Caffeine has the effects of strengthening the heart, relieving spasms, and relaxing smooth muscles. It can relieve bronchial spasms, promote blood circulation, and is a good adjuvant drug for treating bronchial asthma, relieving cough and reducing sputum, and myocardial infarction.
4. Inhibitory effect on arteriosclerosis: The tea polyphenols and vitamin C in tea have the effect of activating blood circulation and removing blood stasis to prevent arteriosclerosis. Therefore, among people who often drink tea, the incidence of hypertension and coronary heart disease is lower.
5. Antibacterial and bacteriostatic effect: The tea polyphenols and tannic acid in tea act on bacteria, can coagulate the protein of bacteria, and kill the bacteria. It can be used to treat intestinal diseases such as cholera, typhoid, dysentery, and enteritis. For skin sores, ulcers with suppuration, and skin abrasions from external injuries, washing the affected area with strong tea has an anti-inflammatory and bactericidal effect. For oral inflammation, ulcers, and sore throat, using tea for treatment also has a certain therapeutic effect.
6. Weight loss effect: Various compounds in tea, such as caffeine, inositol, folic acid, pantothenic acid, and aromatic substances, can regulate fat metabolism. Oolong tea, in particular, has a good decomposing effect on proteins and fats. Tea polyphenols and vitamin C can lower cholesterol and blood lipids, so drinking tea can help with weight loss.
7. Anti-caries effect: Tea contains fluorine. Fluorine ions have a great affinity with the calcium of teeth and can form a "fluorapatite" that is less soluble in acid, like adding a protective layer to the teeth, improving the teeth's acid resistance and anti-caries ability.
8. Inhibitory effect on cancer cells: According to reports, the flavonoids in tea have varying degrees of anti-cancer effects in vitro. The more potent ones are vitexin, morin, and catechins.