Benefits:

1. Antioxidant: Green tea is rich in tea polyphenols and vitamin C. These substances have strong antioxidant properties, which can reduce the concentration of free radicals in the body, reduce the oxidative damage of cells and prevent the occurrence of diseases such as cancer.

2. Help digestion: Theophylline and caffeine in green tea can stimulate gastrointestinal movement and relieve stomach discomfort and acid reflux. In addition, tea polyphenols in green tea also help to promote intestinal peristalsis and protect intestinal health.

3. Lowering blood fat and blood pressure: Tea polyphenols in green tea can lower blood fat and blood pressure and help prevent cardiovascular diseases.

4. Improve immunity: Tea polyphenols in green tea can improve human immunity and prevent various diseases.

5. Improve bad breath: Catechins in green tea can inhibit the growth of bacteria in the mouth and help improve the problem of bad breath.

Disadvantages:

1. Caffeine: Green tea contains a moderate amount of caffeine, which may cause nervous excitement, rapid heartbeat and other reactions, and may also cause allergic symptoms for some people who are prone to allergic reactions.

2. Taboo for some people: People with gastric ulcer, dyspepsia, anemia, heart disease and other diseases should not drink green tea regularly. Pregnant women, babies and children should not drink green tea, because substances such as tea polyphenols and catechins may cause harm to the body.

3. Interaction with some drugs: Tea polyphenols and other components in green tea may interact with some drugs, such as inhibiting the absorption of some drugs and affecting the curative effect of drugs. Therefore, we should pay attention to communication with doctors when taking medicine to avoid unnecessary side effects.