If you're one of those people who routinelyBrainFire burn the candle at both ends, you may find yourself running out of energy midway through the day. Yesterday's overachiever reached for a cup of coffee; today's overachiever might reach for an energy drink instead. Oh, by the way, today's overachiever in need of an energy boost is also more likely to be 12 to 24 years old.Energy drinks are soft drinks advertised as providing energy…