Orthorexia nervosa (ON), or pathologic healthy eating, is a preoccupation with the
nutritional content or purity of food that leads to significantly restrictive eating and
results in nutritional and/or psychosocial impairment.ON is currently debate continues over whether ON is a distinct syndrome or a manifestation of another disorder, such as anorexia nervosa (AN) or obsessive-compulsive disorder. Despite its lack of formal recognition, diagnostic criteria have been developed.Unlike eating disorder symptoms involving fear of weight gain, preoccupation with body shape and weight, inappropriate compensatory behaviors (e.g.,laxative abuse), and binge eating.