Avoid drinking a lot of tea before and after meals. It is not advisable to drink tea for about 20 minutes before and after meals. If you drink tea, it will dilute the gastric juice and affect the digestion of food. Moreover, because tea contains oxalic acid, oxalic acid will react with iron and protein in food, which will affect the absorption of iron and protein by human body.
Avoid drinking tea before bed. It is best not to drink tea within 2 hours before going to bed. Drinking tea will make you feel high, affect your sleep and even insomnia, especially the newly picked green tea. After drinking, the nerves are extremely excited and cause insomnia.
Avoid drinking overnight tea. You'd better drink tea at once. Tea leaves have been stored for a long time, which not only leads to the loss of nutrients such as vitamins, but also tends to be rancid and sick.
Avoid drinking the first tea. Because modern tea is inevitably polluted by pesticides, fertilizers, dust and other substances in the process of planting, processing and packaging. The first tea is actually the water for washing tea. Pour boiling water as soon as possible.
Avoid drinking inferior or deteriorated tea. Deteriorated tea contains a lot of substances and germs harmful to human body, and it is absolutely inedible.
Children should not drink strong tea. Because when the concentration of tea is high, the content of tea polyphenols is too high, which is easy to react with iron in food, which is not conducive to the absorption of iron and is easy to cause iron deficiency anemia in children. Children can drink light tea in moderation.
Avoid drinking tea if you have a fever. Caffeine in tea can not only raise the body temperature, but also reduce the efficacy.
Patients with liver disease should avoid drinking tea. Most substances such as caffeine in tea are metabolized by the liver. If the liver is sick, drinking too much tea exceeds the metabolic capacity of the liver, which will damage the liver tissue.
Neurasthenia, drink tea carefully. Caffeine in tea can excite the nerve center. Drinking strong tea for neurasthenia, especially in the afternoon and evening, will cause insomnia and aggravate the condition. You can drink tea once in the morning and once in the afternoon during the day. It is better to drink scented tea in the morning, green tea in the afternoon and no tea at night.
Pregnant women should avoid drinking tea, especially strong tea. Tea contains a lot of tea polyphenols and caffeine, which has many unfavorable factors for the growth of the fetus in the mother's womb. Pregnant women should drink less or not drink tea.
Women should not drink strong tea during lactation. Drinking strong tea during lactation, too much caffeine will enter the milk, and children will be indirectly excited after breastfeeding, which will easily lead to less sleep and more crying.
Patients with ulcers should drink tea carefully. Tea is a stimulator of gastric acid secretion. Drinking tea can increase the secretion of gastric acid and stimulate the ulcer surface. Drinking strong tea often will worsen the condition.
If you are malnourished, avoid drinking tea. Tea has the function of decomposing fat. People who are already malnourished will be more malnourished if they drink tea to decompose fat.
Be careful when you are drunk. Tea has the function of exciting the nerve center, and drinking strong tea after drunkenness will increase the burden on the heart.
Take medicine with tea carefully. There are many kinds of drugs with different properties. Whether you can drink tea or take medicine depends on the doctor's advice.
Anemia patients should avoid drinking tea. Tannic acid in tea 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.
Patients with urinary calculi should avoid drinking 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.
Patients with coronary heart disease drink tea cautiously. For patients with coronary heart disease with increased heart rate, premature beats or atrial fibrillation, drinking a lot of strong tea will make their heart beat faster, which often leads to their onset or aggravation.
Old people should not drink raw tea. The so-called green tea refers to the green roasted green tea that is directly dried without twisting after being immobilized. Old people drink this kind of green tea, which is very irritating to the gastric mucosa and easy to get stomachache.
Patients with hypertension should not drink strong tea. If hypertensive patients drink too much tea, the exciting effect of caffeine will lead to an increase in blood pressure, which is not conducive to health.