Post by Nancy Shute, The Salt at NPR Food (5/9/13)

Less than two weeks after launching its Alert Energy Caffeine Gum, the Wrigley Company decided that maybe the world wasn't ready for amped-up chewing gum after all.
On April 30, the day after Alert Energy launched, the Food and Drug Administration said it was going to take a "fresh look" at caffeinated foods, particularly their effect on children and teenagers.
Being out front on caffeinated confections evidently wasn't a comfortable place to be.
Yesterday, the Wrigley Co. said it has "paused" sales of Alert Energy, which came in brightly-colored packages. Each pellet of gum contained 40 milligrams of caffeine, about the amount in a half-cup of coffee.