The main functions of white tea include:

1. Antioxidant: White tea contains a large amount of tea polyphenols and flavonoids, which have strong antioxidant effects.

2. Lower blood lipids: The flavonoids in white tea can lower blood lipids and prevent cardiovascular diseases.

3. Anti-cancer and anti-cancer: The tea polyphenols in white tea can promote the regeneration of liver cells and have a protective effect on liver cell damage.

4. Antibacterial and anti-inflammatory: The tea polyphenols in white tea have strong antibacterial and anti-inflammatory effects.

However, white tea also has some taboos and precautions, including:

1. People with weak and cold constitutions should not drink too much white tea, as it can easily cause diarrhea, low back pain and other discomforts.

2. People with stomach problems and ulcers should drink a small amount of white tea to avoid irritating the gastrointestinal tract.

3. Pregnant and lactating women should not drink excessive amounts of white tea.

4. Long-term consumption of large amounts of white tea may cause anemia.