Tea not only has the pharmacological effects of refreshing the brain, clearing away heat and relieving summer heat, resolving phlegm, relieving fatigue and losing weight, clearing away heart fire, relieving hangover, promoting fluid production to quench thirst, reducing fire, improving eyesight, stopping dysentery and removing dampness, but also has certain pharmacological effects on modern diseases such as radiation sickness, cardiovascular and cerebrovascular diseases, cancer and so on. The main components with pharmacological effects in tea are tea polyphenols, caffeine, lipopolysaccharide, theanine and so on.

Drink tea for a long time:

First, drinking tea can lose weight.

Second, drinking tea can prevent tooth decay.

Third, tea can prevent cardiovascular diseases.

Fourth, tea is a good medicine for intestinal diseases.

side effect

Drinking a lot of strong tea often leads to a lot of physical discomfort, such as easy dilution of gastric juice and inability to digest normally. The normal gastric juice secreted by a person every day is 1.5-2.5 liters, which can reasonably digest the food that a person takes in every day. When drinking a lot of strong tea, it will dilute the gastric juice, reduce the concentration of gastric juice, make the gastric juice unable to digest food normally, and cause indigestion, abdominal distension, abdominal pain and other symptoms, and some even cause duodenal ulcer.

In addition, tea hinders the body's absorption of iron. Tea contains tannic acid, black tea contains about 5%, and green tea contains about 10%. When people drink a lot of 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 cause iron deficiency anemia.

And drinking strong tea is easy to cause constipation. Tannic acid in tea can not only combine with iron, but also with protein in food to form massive tannic acid protein, which is difficult to digest and absorb, leading to constipation. For the elderly with constipation, constipation will be more serious.

Finally, strong tea can lead to high blood pressure and heart failure. Caffeine in strong tea can make the human heart beat faster, thus raising blood pressure; At the same time, a large amount of strong tea liquid enters the blood vessels, which can increase the burden on the heart, produce discomfort symptoms such as chest tightness and palpitation, and aggravate the degree of heart failure.

Everything is measured. Drinking light tea can keep you healthy, while drinking strong tea is harmful to your health.