Dear Dietician: orthorexia

Dear Dietitian,

My thirteen-year-old daughter started a new healthy eating program about six months ago. She seems obsessed with healthy eating and sometimes refuses to eat when she stays over at a friend's house. I am concerned about her behavior. Is this something serious or will she grow out of it?

Sheila

Dear Sheila,

The desire to eat right is a healthy, but too much of a good thing is no long...