1. Help relieve anxiety and stress: Green tea contains two substances, L- theanine and glutathione, which help to relax the nervous system and relieve stress and anxiety.

2. Improve immunity: Green tea is rich in antioxidant substances, such as polyphenols and vitamin C, which can eliminate free radicals, protect cells from harm and enhance immunity.

3. Improve metabolic rate: Green tea contains caffeine and tea polyphenols, which can promote metabolism, increase energy consumption, reduce fat accumulation and help to lose weight.

4. Reduce the risk of heart disease and stroke: Green tea is rich in phenolic compounds, which has a good protective effect on the heart and blood vessels and can reduce the risk of heart disease and stroke.

5. Help prevent tooth decay: Tea polyphenols and fluoride in green tea help prevent tooth decay and bad breath.

6. Help to improve cognitive ability: Caffeine and amino acids in green tea can promote nerve transmission in the brain and help improve cognitive ability and memory.

7. Help prevent cancer: Tea polyphenols in green tea can protect cells and reduce the appearance of cancer cells.