Caffeine common in kids, young adults; mainly soda
1 of 1
In this June 3, 2008 file photo, Megan Ward, left, drinks an energy drink with her friend Mykel Prescott from Parker, Colo., at Ward's home in Castle Rock, Colo.
Photos: AVP beach volleyball tournament, July 26
Photos: Nike Four-Ball Championship, July 22
Photos: Island Images: July 2015, Part 2
More Photo Galleries »