Drinking tea after meals will not only lead to indigestion, but also increase the risk of stones. Tea contains tannic acid and theophylline, both of which will affect the digestion of food.

Gastric juice and intestinal juice are essential for human digestion, but when tannic acid enters the gastrointestinal tract, it will inhibit their secretion, which will lead to indigestion. In addition, tannic acid will coagulate with protein in meat, eggs, bean products, dairy products and other foods to form indigestible tannic acid protein clot.

If the food you eat contains metal elements, such as iron and magnesium, tannic acid may react with them and may form stones over the years. In addition, gastric acid is acidic, while tea is alkaline. Drinking tea immediately after meals, theophylline will not only inhibit the secretion of gastric acid, but also dilute gastric acid, affecting the secretion of protease in gastric acid, thus affecting digestion.

Extended data:

Several problems that should be paid attention to when drinking tea

First, drink tea after drinking

Drinking tea can accelerate the decomposition of alcohol in the body, and its diuretic effect can help the decomposed substances to be discharged, so it is helpful to hangover. But at the same time, this accelerated decomposition will increase the burden on liver and kidney. Therefore, people with poor liver and kidney had better not use tea to relieve alcoholism, especially don't drink strong tea after drinking.

Second, drink tea before going to bed

Caffeine contained in tea can excite the central nervous system, so it has always been said that drinking tea before going to bed will affect sleep. At the same time, caffeine is also a diuretic. Drinking plenty of water will inevitably increase the number of times you go to the toilet at night, which will affect your sleep.

Third, boil water to make tea.

Advanced green tea is generally brewed with water at about 85℃. Overheated water often reduces the freshness and refreshing feeling of tea soup. Oolong tea such as Tieguanyin is best soaked in boiling water, and the tea smell is better; Pressed tea, such as Pu 'er cake tea, can also consider cooking tea, so that the characteristic quality components in Pu 'er tea can be fully leached.

Make tea with paper cups or thermos cups.

There is a layer of wax on the inner wall of the paper cup, which will affect the taste of tea after dissolution; The thermos cup sets a high temperature and constant temperature environment for tea, which will make the color of tea yellow, dark, bitter and stuffy, and even affect the health care value of tea.

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