Anorexia nervosa is a multifaceted condition of emotional, physical, and behavioral changes associated with an individual's reluctance to maintain a minimally normal body weight (body weight below 15% of what is expected for current age and height); it affects roughly 0.1 % of the adult population of the United States. Typically, the individual displays an extreme fear of weight gain and exhibits a distorted perception of his or her size and body shape. Significant weight loss is generally achieved by eating fewer calories than is needed to sustain the body's metabolic requirement. Although anorexia nervosa is primarily diagnosed in adolescent females (accounting for approximately 90% of diagnosed population) around the time of pubertal change, the number of identified males with the disorder is increasing. Males, ...

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