1, gastrointestinal diseases

Some of the ingredients in the coffee will make our stomach acid secretion become more, but also stimulate the gastric mucosa, drink too much, it may also lead to gastric ulcers, especially in the empty stomach when drinking coffee, the greatest damage to the stomach. If you have a perennial stomach problems, or your stomach and intestines are more sensitive, and then drink the coffee, the impact on the stomach will be greater, but also aggravate their own conditions.

2, carcinogenic

The carcinogenicity of coffee is 2B, which mostly occurs when the coffee beans are not fresh, or the coffee beans are moldy and made out of the coffee, such coffee will have the risk of carcinogenicity, while the coffee also contains a number of chemical components, long-term coffee, then, on the body's various functions are damaged.

3, nervousness

Drinking coffee in moderation is good for our brain, but if it is too much, it will produce stimulants, which is harmful to our nerves and may make people anxious. In this case, people tend to become nervous and sweaty, and the more coffee you drink the more likely you are to become agitated.

4, harm to the eyes

Often drink coffee for the eyes is harmful, this is because the caffeine in the coffee will make the blood vessels around the eyes continue to contract, in the process of contraction will make the nutrients into the eye cells continue to reduce the speed of the eyes will greatly reduce the removal of waste. Therefore, in order to protect the eyes in life, it is best not to drink more coffee.