It's no secret that we need calories to fuel the body's basic energy needs. Yet many of us find it difficult to take in the right amount—and the right kind—of fuel. No matter how many guidelines we're given, we still crave what we know is bad for us.
Eating disorders, among them anorexia nervosa (voluntary starvation) and bulimia nervosa (binge-eating followed by purging), occur frequently—but not exclusively—in affluent cultures. A disproportionate number of the diagnosed are young women in their teens and 20s, but the prevalence among young men has increased over the years.