Anorexia nervosa is a psychiatric disorder characterized by abnormal eating behavior, severe self-induced weight loss, and a specific psychopathology such as Body weight willfully maintained below normal level, Abnormal perception of body morphology, Intense fear of weight gain. By Adolescence to young adulthood is the predominant age. Mean age of onset is 17 yr. Approximately 0.5% to 1% of college-aged women have anorexia nervosa.