1. Improve immunity: Both green tea and black tea are rich in antioxidants, which can eliminate free radicals and enhance human immunity.

2. Regulating cardiovascular function: Black tea contains effective components such as tea polyphenols and flavonoids, which helps to lower cholesterol and blood pressure, relieve arteriosclerosis and is beneficial to cardiovascular health. Green tea can also lower cholesterol and blood pressure, and has the function of regulating blood lipid and blood pressure.

3. Anti-cancer and anti-cancer: Tea contains a variety of antioxidant substances, which can scavenge free radicals and reduce the occurrence of tumors. Green tea, in particular, contains a variety of anticancer components, such as tea polyphenols and anthocyanins, which have a good effect on preventing and treating cancer.

4. Health care and beauty: Tea polyphenols in tea have antioxidant effect, which can help the skin to keep moisture, accelerate blood circulation and make the skin healthier and more beautiful.

Taboos for black tea and green tea:

1. Pregnant women and lactating women should not drink more tea.

2. People with gastric ulcer, duodenal ulcer, liver disease and other diseases should drink less tea.

Patients with severe hypertension and severe heart disease should avoid drinking tea.

4. It is not advisable to drink tea during the treatment of traditional Chinese medicine, because tea contains some substances that will affect the absorption and metabolism of drugs.