1. Help to lose weight: Catechins and caffeine in green tea can speed up metabolism, promote fat burning and help to lose weight and fat.

2. Protect the heart: Green tea can reduce cholesterol and reduce the risk of heart disease.

3. Antioxidant: Tea polyphenols in green tea can resist the attack of free radicals and help prevent aging and cancer.

4. Refreshing: Caffeine in green tea can improve attention and energy, and help to improve work efficiency.

5. Protect teeth: Fluoride in green tea can prevent dental caries and tooth decay.

6. Reduce the risk of diabetes: Polyphenols in green tea can lower blood sugar and help prevent diabetes.

Taboo:

1. Pregnant women and lactating women should avoid drinking a lot of green tea, because the caffeine in it will be passed on to the fetus or baby.

2. Because caffeine and theophylline in green tea can promote the activity of nervous system and the stimulation of respiratory system, drinking too much green tea at night may lead to insomnia.

Tannic acid and caffeine in green tea can stimulate gastric acid secretion, so people with hyperacidity and gastritis should drink less or avoid drinking green tea.