Is it harmful to drink too much coffee in America?

American coffee belongs to black coffee, which contains protein, caffeine, polyphenols, nicotinic acid and free fatty acids. Moderate drinking can refresh the mind, improve constipation and increase satiety. Although American coffee itself will not cause harm to the human body, if it is drunk in large quantities, it will cause some harm to the body, such as palpitation, palpitation and insomnia.

1. Advantages: Compared with other coffees, American coffee is simpler to make and lighter in taste. Moreover, because the extraction time is longer, the caffeine content of American coffee is higher. Caffeine can stimulate nerve excitement, help to refresh the mind, eliminate fatigue, promote blood circulation, stimulate gastrointestinal secretion, promote digestion and improve constipation. In addition, American coffee contains free fatty acids and other substances, which will increase satiety after drinking and reduce the body's intake of other foods to a certain extent, thus helping to lose weight;

2. Disadvantages: Drinking a lot of American coffee, in which caffeine may be excessively excited, prone to palpitations, palpitations and other symptoms. If you drink too much at night, it may lead to insomnia. Drinking American coffee on an empty stomach may stimulate excessive gastric acid secretion, leading to gastrointestinal discomfort, especially for people with gastritis, gastric ulcer and hyperacidity. In addition, some people may have caffeine addiction when drinking American coffee, which is manifested by increasing the amount of coffee to refresh themselves. If they do not continue to drink coffee to meet the body's demand for caffeine, they may have headaches and other manifestations.

For people with diabetes, hypertension, osteoporosis and iron deficiency anemia, as well as athletes, pregnant women, insomnia and lactating women, it is not recommended to drink American coffee in large quantities to avoid adverse effects on the body.

In addition, some people think that American coffee contains antioxidants or purines, which can resist oxidation or improve dry eye. Others think that drinking American coffee can prevent gallstones, dissolve blood clots and resist aging. There is no relevant scientific basis for this effect. People who lose weight should pay attention not to lose weight only by drinking American coffee for a long time, but to choose a scientific way to lose weight through diet control and proper exercise.