1. Tea is rich in tea polyphenols, which can play an antioxidant and anti-aging role.

Tea contains caffeine, which can improve the alertness and thinking ability of brain.

3. It contains theophylline, theanine and other chemicals, which can eliminate fatigue and improve body energy.

Tea is rich in vitamins, minerals and other nutrients, which is conducive to maintaining good health.

5. It can promote metabolism in the body and help digestion and excretion.

Disadvantages:

1. Drinking too much tea is easy to produce pigment precipitation on teeth, leading to yellowing of teeth.

2. Excessive drinking tea will increase the burden on the stomach and cause problems such as hyperacidity and gastrointestinal discomfort.

3. Tea contains theophylline, caffeine and other ingredients. Excessive drinking can cause problems such as excitement and insomnia.

4. Tea also contains harmful substances such as thiazoline, and excessive drinking may have adverse effects on the body.

5. Tea drinking time will affect people's sleep, and drinking tea too late at night will lead to a decline in sleep quality.