1. Refreshing: Caffeine and tea polyphenols in tea can promote nervous system activity and improve people's mental state.

2. Relieve fatigue: Tea polyphenols and caffeine in tea can promote metabolism and eliminate fatigue.

3. Reduce blood lipids: Tea polyphenols in tea can reduce blood lipids and reduce the occurrence of cardiovascular diseases.

4. Prevention of cancer: Tea polyphenols in tea can inhibit the growth of cancer cells and have the effect of preventing cancer.

5. beauty beauty: Polyphenols and vitamins in tea can promote skin metabolism and keep skin healthy.

However, drinking tea also has the following disadvantages:

1. Too much tea will affect sleep: caffeine in tea will stimulate the brain and make it difficult for people to fall asleep.

2. Get angry: Theophylline, caffeine and other substances in tea are easy to cause getting angry.

3. Too much sugar: too much sugar will increase calories and gain weight.

4. Excessive drinking: Excessive drinking of tea leaves can lead to theophylline poisoning, causing nausea, headache and other symptoms.