Caffeine is a bitter substance that stimulates your central nervous system. This means it can help boost your alertness and eliminate your drowsiness, according to MedlinePlus.com. Chances are you consume some caffeine on a regular basis if you drink coffee or tea, drink soda or eat chocolate. And although caffeine is widely consumed, it still is considered a drug and it comes with some potential disadvantages.
You are at a higher risk of undesirable side effects from caffeine if you have more than 500 to 600 milligrams of caffeine per day, which is contained in more than 4 cups of brewed coffee. Some immediate side effects of high caffeine consumption are nervousness, restlessness, upset stomach, rapid heartbeat, muscle tremors and irritability, according to MedlinePlus.com. In the long term, drinking a lot of caffeine throughout the day might lead to a vicious cycle of insomnia and fatigue, wherein you consistently lose sleep because of caffeine’s effects, but then you need to drink caffeine to be alert during the day.