1. People with stomach problems: Because Pu'er tea contains a lot of caffeine, for people with hyperacidity and gastric ulcers, drinking tea during a stomach attack will dilute the gastric juice, which is not conducive to digestion, and It can easily cause acid esophageal reflux and even aggravate ulcers. So here I would like to remind everyone that even if you have mild gastrointestinal problems, stomach deficiency or coldness, you should avoid drinking tea on an empty stomach in the morning to avoid affecting gastrointestinal function and causing stomach pain. The best way is to eat before drinking, which will be better for your body.

2. People taking medication: I believe everyone knows this. Generally, you should try to avoid drinking tea before and after taking medication. It is best to leave the two hours apart. Because the tannic acid and tea polyphenols in tea can chemically react with certain drugs, thus affecting drug absorption.

3. People with constipation: Most of the dietary fiber that people eat is too fine and contains a large number of additives, which is not conducive to human digestion and absorption, and often easily leads to constipation. At this time, the tea polyphenols in tea will also make the stool more dry and firm, especially black tea, which is warm in nature and easy to get angry. Therefore, for people with strong stomach fire, water is the best way to treat constipation, and tea can only be drunk after the constipation is cured.

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4. Children: Children are in a critical period of bone growth and development, and the alkaloids in tea will destroy the absorption of calcium, leading to Children have skeletal dysplasia and are short and thin. The tannic acid in tea combines with the iron in the intestines and turns into insoluble substances, causing iron deficiency and anemia in children. Parents should remember not to give tea to children indiscriminately, and should be cautious and appropriate when giving tea to children.

5. Pregnant women, nursing mothers or women during menstruation: Pregnant women should not drink too much Pu'er tea, as it may inhibit the growth of children. Women during menstruation are not suitable for drinking Pu'er tea because of iron deficiency during menstruation. Drinking Pu'er tea will cause the body to be unable to absorb iron; breastfeeding mothers should not drink tea, and strong tea will hinder the secretion of breast milk, so do not be careful.

6. People with poor kidney function or kidney deficiency: Alkali itself has a strong diuretic effect. Especially after dinner and especially before going to bed, even normal people, if they drink too much tea during this period, it will increase nocturia, affect sleep, and some people may even suffer from insomnia. So you need to drink it in moderation.