1. Refreshing: It contains theophylline, which can speed up blood circulation, improve the ability to excite the nervous system and help improve memory.

2. Anti-inflammatory and sterilization: Polyphenols and catechins can kill single-celled bacteria and slow down the inflammatory reaction.

Precautions:

1. New tea is not suitable for drinking;

2. Avoid making tea first to remove surface chemicals;

Don't drink too strong tea, otherwise it will have a negative impact on your health.

1. Refreshing: Caffeine and tea polyphenols in black tea have refreshing effects, which can relieve fatigue and stress.

2. Antioxidants: Tea polyphenols in black tea have antioxidant effect, which can protect body cells from free radicals and prevent aging and diseases.

3. Promote digestion: Tea polyphenols in black tea can also promote digestion and relieve stomach discomfort and stomachache.

4. Lowering cholesterol: Tea polyphenols and caffeine in black tea can lower blood cholesterol and prevent cardiovascular diseases.

5. Anti-cancer: Tea polyphenols in black tea can prevent the growth and spread of cancer cells and have a certain anti-cancer effect.

6. Improve bad breath: Tea polyphenols in black tea can also inhibit oral bacteria and improve bad breath.

7. Alleviate allergies: Tea polyphenols in black tea can relieve allergic symptoms, relieve itching and diminish inflammation.