＊Discussing EffectⅠ＊

Many people enjoy drinking beverage, which may contain caffeine, while few know the effects of too much caffeine. First, caffeine often links to sleeping disorder, such as insomnia. Since caffeine is used to enhance alertness and stay awake, it may cause difficulty in sleeping. Second, on the basis of medical studies, people may vomit and cramp after consuming the caffeine. Again, as caffeine’s stimulation, it speeds up metabolism and blood pressure, which likely lead to nausea and other gastrointestinal problems. Third, although there hasn’t direct association between caffeine and heart disease, survey that it causes irregular heartbeat is well-known. Following the second statement, there is no denying that caffeine makes one’s heart beat faster than normal. According to these serious aftermaths of caffeine, one should pay close attention to what I mention.