What is orthorexia nervosa?What are the main signs and symptoms of orthorexia nervosa?How is orthorexia nervosa diagnosed?What are some of the main medical treatments for orthorexia nervosa?Have any supplements been studied for orthorexia nervosa?Are there any other treatments for orthorexia nervosa?What causes orthorexia nervosa?What is “healthy orthorexia” and how does it differ from orthorexia nervosa?Are certain people at a higher risk for orthorexia nervosa?