The causes of these deaths have been linked to amounts of caffeine and unregulated use of herbal supplements.
“Research shows that beyond a brief caffeine high, there are actually no health benefits to energy drinks. In fact, the combination of different chemicals is likely to do more harm than good, especially for children. Some of the unwelcome side effects of the drinks include elevated heart rates, hypertension, anxiety, headaches and interrupted sleep patterns. A recent study by the University of Miami suggests even more serious outcomes, such as heart palpitations, strokes and sudden death.”
Not only that, your teeth enamel are greatly affected with the "acid" that energy drinks give the body. Your teeth enamel are damaged causing more cavities and decay.