Drinking strong tea can promote excessive acid secretion in the stomach. Because the alkaloids in tea can reduce the activity of phosphodiesterase, which can inhibit the secretion of gastric acid by gastric parietal cells, and make gastric parietal cells secrete a large amount of gastric acid. Over time, it is easy to form gastric and intestinal ulcers or make the existing ulcer surface difficult to heal.
Constipation may be caused by frequent drinking of strong tea. Tea polyphenols in tea have strong astringency to intestinal and gastric mucosa. The high content of tea polyphenols in strong tea will make the astringency stronger. It will slow down the contraction of stomach and the peristalsis of intestinal tract, thus affecting the digestion and absorption of food, and easy to cause dry stool and even constipation.
In addition, a large amount of tea will also cause the loss of a variety of nutrients. Nutrition experts have found that malnutrition in modern people is not eating poorly, but the nutritional composition is out of balance. Among them, tea is one of the factors causing nutritional imbalance. Because excessive drinking of tea will increase urine volume, which will lead to loss of magnesium, potassium, B vitamins and other important nutrients. Therefore, tea should not only not be too strong, but also avoid repeated brewing so that a large amount of water into the body, resulting in nutrients loss with urine.
Now, the harm of strong tea has been basically understood, but what kind of tea is considered as strong tea? Li Haiwen reminds us that there seems to be no generally accepted standard at present, but we can simply use a sentence to judge: Look at its face, taste its taste. Cha Qiyan is to see the color of tea. The color of strong tea is generally deeper and the tea is turbid. When the tea is cool, a shallow layer of tea oil can be seen floating on the tea. Taste its taste is the taste of tea, strong tea often tastes bitter and astringent. Generally, people who like strong tea are just for this taste.
Experts interviewed: Li Haiwen, deputy director of cardiovascular medicine, Second Affiliated Hospital of Guiyang College of Traditional Chinese Medicine, and Wang Xin, deputy director of cardiology, Jilin Peoples Hospital