Most energy drinks typically contain large amounts of caffeine; added sugars; and legal stimulants, such as guarana, taurine, and L-carnitine. Despite mounting concerns about the safety of energy drinks, global energy drink market is estimated to reach over $60 billion by 2021. A study from Northwestern University has found a surprising number of caffeine overdoses related to caffeine pills and drinks based on reports to a Chicago based poison control centre.
Researchers found that during the three year study period, over 250 cases of caffeine abuse were reported; twelve percent of these required a trip to the emergency room.
Researchers warn that caffeine is a drug, and should be treated like one. Concern also arises when caffeine drinks are combined with alcohol, because people often don't feel as drunk when the two are combined - putting drinkers at greater risk for alcohol poisoning.
Energy drinks taken in large doses can cause rapid heartbeat, as well as numbness and tingling in the hands and feet.
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