Energy drinks are not only gaining popularity among athletes but also other youth. The high caffeine and sugar content gives an instant surge of energy but it also causes many other health complications. Here are 6 things about energy drinks you didn't know. Middle-school children who consume heavily sweetened energy drinks are 66 percent more likely to be at risk for hyperactivity and inattention symptoms reveals a new study. The finding has implications for school success and lends support to existing recommendations to limit the amount of sweetened beverages school children drink. The authors also recommend that children avoid energy