'tea contains tannin and theophylline, both of which affect the digestion of food. 'gastric juice and intestinal juice are essential for human body to digest food. When tannic acid enters the gastrointestinal tract, it will inhibit their secretion, resulting in indigestion. In addition, tannic acid will coagulate with protein in meat, eggs, bean products, dairy products and other foods, forming a coagulant of tannic acid protein which is not easy to be digested. It should be noted that if the food you eat contains metal elements, such as iron and magnesium, tannic acid may react with them, and stones may form over the years.
In addition, the gastric acid is slightly acidic, while the tea water is slightly alkaline. Drink tea immediately after meals. Theophylline will not only inhibit the secretion of gastric acid, but also dilute the gastric acid, affect the secretion of protease in gastric acid, thus affecting digestion. Relevant experiments also showed that drinking 15 grams of tea after meals would reduce the absorption of iron in food by 50%. The higher the concentration of tea, the greater the harm to the body.
Go to a restaurant for dinner. People don't forget to ask for a cup of tea before the meal is served. It's better to drink less tea before dinner. If you want to drink, you should choose chrysanthemum tea and other light tea, but remember not to drink tea in the process of eating, which is more likely to lead to indigestion.
How long can I have tea after dinner
At least half an hour later, it's better to drink some water after one hour or one and a half hours. The digestion time of food in the stomach is about 30 minutes or longer. Tea contains more alkali. In order to avoid indigestion, it's better to drink some water after dinner.