1, not suitable for tea drinkers.
1, avoid drinking tea if you have a fever.
Caffeine in tea can not only raise the body temperature, but also reduce the efficacy.
2, patients with liver disease 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.
3, neurasthenia, be careful with tea.
Tea contains a lot of caffeine, which can excite the central nervous system. For people with neurasthenia, strong tea, especially in the afternoon and evening, will increase the risk of illness and cause insomnia. Therefore, it is suggested that such people drink tea once in the morning, once in the afternoon and drink more scented tea. Drinking tea at night is not recommended. Only in this way can we avoid insomnia.
4, pregnant women avoid drinking tea
Especially not suitable for drinking strong tea, which contains a lot of tea polyphenols and caffeine, which has many unfavorable factors for the growth of the fetus in the mother's womb. In order to make the fetus develop normally and avoid excessive stimulation of caffeine to the fetus, pregnant women should drink less or not drink tea.
5. 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.
6. 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. But for mild patients, you can drink some light tea after taking the medicine for 2 hours. Adding sugar black tea and milk black tea is helpful to diminish inflammation and protect gastric mucosa, and also has certain curative effect on ulcer. Drinking tea can also block the synthesis of nitroso compounds in the body and prevent precancerous mutation.
7, malnutrition avoid drinking tea.
There is a substance in tea that can help the body break down fat. For people who are malnourished, drinking tea will also break down fat, leading to increased malnutrition.
8. 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. Drinking tea will also accelerate diuresis, so that toxic aldehydes in alcohol will be discharged from the kidneys before decomposition, which is very irritating to the kidneys and harmful to health. Therefore, for people with heart disease or poor function, don't drink tea, especially don't drink a lot of strong tea; For healthy people, you can drink a small amount of strong tea. When you wake up, you can eat a lot of fruit or sip vinegar to speed up human metabolism and relieve drunkenness.
9. Take medicine with tea with caution
There are many kinds of drugs with different properties. Can you drink tea and take medicine? You can't generalize. Tannin and theophylline in tea can change chemically with some drugs. Therefore, when taking hypnotic sedative drugs, iron-containing blood-enriching drugs, enzyme preparation drugs, protein and other drugs, tea polyphenols are easy to react with iron and precipitate, so it is not appropriate to use tea to give drugs, so as not to affect the curative effect.
Some Chinese herbal medicines, such as Herba Ephedrae, Ramulus Uncariae cum Uncis, Rhizoma Coptidis, etc., should not be mixed with tea. It is generally believed that it is not advisable to drink tea within 2 hours after taking the medicine. When taking some vitamin drugs, tea has no effect on the efficacy, because tea polyphenols in tea can promote the accumulation and absorption of vitamin C in the human body.
At the same time, tea itself contains a variety of vitamins. Tea itself has the functions of excitement, diuresis, blood lipid reduction and blood sugar reduction, which can enhance the efficacy of the human body and restore health. In addition, people often think that it is not appropriate to drink tea when taking tonic such as ginseng antler, which is also reasonable.
10, anemia patients should not drink 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.
1 1, patients with urinary calculi should not drink 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.
2. Taboo of drinking tea for the elderly
First, avoid drinking tea on an empty stomach.
Drinking tea on an empty stomach will cool the spleen and stomach. There has been a saying in China since ancient times that "you don't drink hollow tea".
Second, avoid drinking hot tea.
Too hot tea irritates throat, esophagus and stomach. If you drink hot tea for a long time, it may cause pathological changes in these organs. According to foreign research, drinking tea above 62℃ often will damage the stomach wall and lead to stomach problems. The temperature of drinking tea should be below 56℃.
Third, avoid drinking herbal tea.
Warm tea and hot tea can make people feel refreshed and clear-headed; Herbal tea has the side effect of cold coagulation and phlegm accumulation.
Fourth, avoid strong tea.
Strong tea contains more caffeine and theophylline, which is irritating and easy to cause headache and insomnia.
Fifth, avoid too long brewing time.
If the brewing time is too long, tea polyphenols and aromatic substances in tea may automatically oxidize, which not only makes the color of tea soup darker, the taste worse and loses its taste value, but also reduces the nutritional components in tea due to oxidation. At the same time, tea soup will be polluted by the surrounding environment because it has been put on hold for too long, which is very unsanitary.
Sixth, avoid too many brewing times.
Generally, after three or four times of brewing, there is no catechin in tea, which has almost no health care effect. According to relevant tests, the water content of the first soak is 50%, the second soak is 30%, the third soak is 10%, and the fourth soak is only 1%-3%.
Seven, avoid drinking tea before meals.
Drinking tea before meals will dilute saliva, make the diet tasteless, and temporarily reduce the function of digestive organs to absorb protein.
Eight, avoid drinking tea immediately after meals.
Tea contains tannic acid, which can coagulate with protein and iron in food and affect the digestion and absorption of protein and iron.
Nine, avoid replacing medicine with tea.
Tea contains a lot of tannins, which can be decomposed into tannic acid, which combines with many drugs to produce precipitation, which hinders absorption and affects drug efficacy.