Read this story from a news station in Tennessee.
They can't quite get the story straight, can they? Is it the scary overweight teens, or is it the scary eating-disordered teens?
Oh, and P.S.: By the time you notice changes to someone's hair, nails, and teeth, they're deep in an eating disorder. If you want to be helpful to parents, give them some earlier warning signs to look for, like preoccupation with cooking, excuses for not eating, cutting out whole categories of food, using the bathroom after every meal, etc.