1, don't drink a lot of tea when eating.

Drinking a small amount of tea before or during meals is not a big problem, but if you drink a lot of tea or drink too much tea, it will affect the absorption of many macro elements (such as calcium) and trace elements (such as iron and zinc). Pay special attention not to drink tea at the same time when drinking milk or other dairy products. Theophylline and tannic acid in tea will combine with calcium in dairy products to form water-insoluble calcium salts, which will be excreted, greatly reducing the nutritional value of dairy products.

2. It is not advisable to drink tea after drinking

After drinking, the alcohol in the wine enters the blood through the gastrointestinal tract, and is converted into acetaldehyde in the liver, which is then converted into acetic acid, which is then decomposed into carbon dioxide and water to be excreted. After drinking tea, theophylline in tea can quickly diuretic the kidney, thus promoting the undecomposed acetaldehyde to enter the kidney prematurely. Acetaldehyde has a great stimulating effect on the kidney, so it will affect the renal function. People who often drink strong tea after drinking are prone to kidney disease. Not only that, the ethanol in wine is very irritating to the cardiovascular system, and tea also has the effect of exciting the heart. The combination of the two enhances the stimulation to the heart, so drinking tea for heart patients is more harmful.

Extended data:

Although tea has a good health care function, it can't be drunk every time, especially female friends should pay special attention to avoid getting worse! The periods when female friends are not suitable for drinking tea are divided into:

1, menstrual period

Female friends consume a lot of iron during menstruation, so female friends should supplement vegetables and fruits rich in iron, such as spinach, grapes and apples. Tea contains as much as 50% tannic acid, which will hinder the absorption of iron by our intestinal mucosa and greatly reduce the absorption of iron, so it is easy to combine with chyme or blood-enriching iron in the intestine to produce precipitation.

2. During pregnancy

Generally, the caffeine concentration in strong tea is as high as 10%, which will increase the number and frequency of urination and heartbeat of pregnant women, increase the load on their hearts and kidneys, and more easily lead to pregnancy poisoning, so it is best for pregnant women not to drink tea.

3. During breastfeeding

Because if you drink a lot of tea during this period, the high concentration of tannic acid contained in tea will be absorbed by the mucosa, which will affect the blood circulation of the breast, and then inhibit the secretion of milk, resulting in insufficient milk secretion. In addition, caffeine in tea will penetrate into milk, indirectly affecting the baby, which is not good for the baby's health.

4. menopause

In addition to dizziness and fatigue, sometimes there are phenomena such as accelerated heartbeat, bad temper and poor sleep quality. If you drink too much tea, these symptoms will get worse. Therefore, if people who like drinking tea are at these special stages, it is best to stop, so as not to ruin their health!

References:

Baidu encyclopedia-drinking tea