In recent days, because of time difference, a large number of football fans all over the world stay up late to watch the games of the World Cup at night. They drink coffee to drive away sleepiness. Because of inadequate sleep, they also need to drink coffee in the daytime in order to maintain the normal work and studies. They only sleep three to four hours a day. The World Cup lasts nearly a whole month, which means these football fans will never have adequate sleep for nearly 30 days. Because of irregular work and rest and excessive absorption of coffee, many problems like insomnia, hypertension and even heart disease can be caused.
According to the recent market research, the sales volume of coffee has been raised two to three times than that in spare time. A football fan says that in order to watch the footfall games consciously, he always drink several cups of coffee at night. Just because of these cups of coffee, he nearly can not fall asleep. When he is at work, he has to drink more cups of coffee to refresh himself. Now, his blood pressure has been much higher than before. The doctor has advised him to reduce the intake of coffee.
The caffeine contained in coffee can effectively raise the alertness, sensibility and concentration for people. However, the intake of coffee should be less than 10 grams each time with less than three times a day. If people drink too much coffee, the secretion of adrenaline inside the human body will be increased sharply, which further causes quicker and quicker heartbeat and higher and higher blood pressure and even some abnormal phenomena like nervousness, impatience and tinnitus.
Except what have been mentioned above, some other harms of caffeine should also be noticed. As caffeine can stimulate the intestinal tract and make the intestinal tract shrink, it can cause diarrhea when people drink coffee with an empty belly. In addition, caffeine can increase the secretion of gastric acid and finally cause gastric ulcer. Caffeine can also increase the blood cholesterol and triglyceride and cause many diseases like arrhythmia. Therefore, people should drink coffee in a right amount and use other drinks to take the place of coffee. For example, soya-bean milk with red dates can provide the full spirit for people.
In order to keep healthy, people should say bye-bye to coffee. When people have to stay up late, fresh vegetables and moderate outdoor exercises can provide enough nutrients and energy for people to consume at night.
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