Drinking green tea in moderation over a long period of time is generally not harmful, but if you drink green tea in excess of the bad side of the stomach, affecting sleep and so on.
Green tea is a common beverage, in which every 100g of green tea contains 50.3g of carbohydrates, 34.2g of proteins, 5.8g of carotenoids, 0.325g of calcium, 1.661g of potassium and other nutrients, which can provide the body with the nutrients it needs to maintain the normal physiological functions of the body.
If you drink a lot of green tea for a long time may cause excessive secretion of gastric acid, resulting in stomach discomfort, such as bloating, abdominal pain and so on.
Green tea also contains a large amount of caffeine, this substance will have an excitatory effect on the central nervous system, will make the brain in a state of excitement, some of the poor sleep quality of the population may appear difficult to fall asleep, thus affecting the quality of sleep.
People who are allergic to green tea should be prohibited from drinking it, so as not to induce an allergic reaction.