Sihaiwang: everything has a degree, too much is not enough, extreme things will be reversed. This is the philosophy of life left by our ancestors. It can be said that it can be used in anything, and tea is no exception. If you drink tea properly, you can keep healthy; if you drink tea improperly, you will hurt yourself. There are three criteria for appropriateness.
First, the tea should be moderate in intensity. Generally, it is better to brew a cup of tea with 3 grams of tea (a cup of Yibao water with a capacity of 150ml, about half a bottle of small size) (Kungfu brewing method of Oolong tea is not considered). Tea is too thick, it will affect the absorption of iron and other inorganic salts in food, cause anemia and damage health.
Secondly, the quantity of tea should be controlled. The amount of tea drinking depends on tea drinking habits, age, health status, living environment, customs and other factors. Generally healthy adults have the habit of drinking tea at ordinary times. It's appropriate to drink about 12g of tea a day (about 8g of Tieguanyin in a small bubble bag). It's also suitable for people who have a large amount of physical labor, consumption and food consumption, especially those who are exposed to high temperature environment and toxic substances, to drink about 20g of tea a day. People who have more greasy food and a large amount of alcohol and tobacco can also appropriately increase the consumption of tea. But remember, drinking tea should not be excessive, especially at night, because it will increase the burden of the human kidney;
Third, tea time should be appropriate. Don't drink tea within an hour before and after meals, otherwise it will affect the absorption of protein. In fact, it is not appropriate to drink a lot of tea in the evening, which will make people excited and affect sleep. The reason is that tea contains caffeine, which is a central nervous stimulant and has a refreshing effect. And the content of caffeine in tea is very high, each cup of 150 ml tea soup contains about 40 mg caffeine. If you drink too much tea at night (you can't sleep if you drink more than 3 cups), you will really lose sleep until dawn.
So, what is the effect of drinking too much tea on the body? Specifically, there are five points as follows:
1. Lead to tea intoxication
If you drink tea on an empty stomach or drink too much tea in a row, you will have dizziness, panic, cold sweat, nausea and other symptoms, commonly known as "tea intoxication" (tea intoxication is like drunkenness, the truth is similar). If you have the above discomfort, you can immediately eat dessert, cake, sour plum and other things, to neutralize the phenomenon of tea intoxication. So when you go to a teahouse or tea exhibition to have tea, the businessmen will match some refreshments on the tea table in order to prevent the tea from getting drunk.
2. Affect normal digestion
Drinking a lot of tea regularly is prone to many physical discomfort, for example, it is easy to cause gastric juice dilution and normal digestion. A person's daily normal secretion of gastric juice is 1.5-2.5 liters. These gastric juice can reasonably digest the food a person eats every day. After drinking a lot of tea (especially strong tea), it will dilute the gastric juice, reduce the concentration of gastric juice, so that the gastric juice can not digest food normally, resulting in dyspepsia, abdominal distention, abdominal pain and other diseases, and some even cause duodenal ulcer.
3. Block the absorption of iron by human body
Tannin is contained in tea, 5% in black tea and 10% in green tea. When the human body drinks a lot of tea (especially strong tea), the combination of tannic acid and iron will be more active, which will bring obstacles and influence to the absorption of iron and make the human body appear iron deficiency anemia. Therefore, anemia patients, especially those suffering from iron deficiency anemia, should remember: drinking tea should not be excessive, otherwise it will aggravate the condition.
4. Prone to constipation
The tannic acid in tea not only can combine with iron, but also can combine with protein in food to form a kind of massive, indigestible tannic acid protein, which leads to constipation. For the elderly with constipation will make constipation more serious.
5. Affect sleep quality
Caffeine in tea has the effect of refreshing and refreshing, which can make the human heart beat faster and feel excited, thus affecting the quality of sleep. More detailed reasons are explained in the third point of the three principles of tea drinking, which will not be repeated here.