Green tea contains a lot of caffeine, these alkaloids can promote the excitement of the brain center, so people who often suffer from insomnia had better not drink tea, especially before going to bed, otherwise it will make the body more excited and difficult to fall asleep.

2, anemia patients avoid drinking green tea.

Tannic acid in green tea leaves can combine with iron to form insoluble final compounds, so that the body can not get enough iron source, so anemia patients should not drink tea.

3. Patients with urinary calculi should avoid drinking green tea.

Urinary calculi are usually calcium oxalate stones. Because tea contains oxalic acid, it will form stones with calcium excreted in urine. Patients with urinary calculi will get worse if they drink a lot of tea.

Extended data

The efficacy of drinking green tea

1, refresh

Many people choose to drink a cup of green tea when they are sleepy because green tea contains a lot of caffeine. Drinking tea can promote the excitement of nerve center and cerebral cortex, and has a certain effect on relieving migraine. But don't drink tea before going to bed at night, or you will lose sleep easily.

Step 2 Prevent cancer

Green tea also contains a lot of tea polyphenols, which can block the synthesis of various carcinogens such as nitrate, effectively kill cancer cells and improve the body's immunity. Green tea is usually better for old friends and can prevent cancer. Tea polyphenols can also sterilize and diminish inflammation, and have obvious inhibitory effect on bacteria.

3, delay aging

Tea contains lipopolysaccharide, which can help the body resist radiation, especially in summer. It can resist the ultraviolet radiation of the sun and avoid the damage of strong radiation to the skin. In addition, tea polyphenols in green tea can remove its own protective cell membrane and delay skin aging, which is necessary for women who love beauty.

4. Burn fat

Tea is one of the essential products for girls who love beauty. As mentioned above, lipopolysaccharide in tea helps to resist radiation and delay aging. Tea is rich in vitamin C, and its extremely low calorie can reduce the accumulation of fat in the body and has the function of burning fat.

People's Network-What's the effect of drinking green tea? What are the taboos for drinking green tea?

People's Network-Drinking tea is good for health, so these people should not drink it.