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Anorexia nervosa is an eating disorder characterized by excessive food restriction and fear, irrational fear of gaining weight, and a distorted body self-perception. It typically involves excessiveweight loss. Anorexia nervosa usually develops during adolescence and early adulthood.[1] Due to the fear of gaining weight, people with this disorder restrict the amount of food they consume. Thisrestriction of food intake causes metabolic and hormonal disorders.[2] Outside of medical literature, the terms anorexia nervosa and anorexia are often used interchangeably; however, anorexia is simply amedical term for lack of appetite. However, people with anorexia nervosa do not lose their appetites. [3] Anorexia nervosa has many complicated implications and may be thought of as a lifelongillness that may never be truly cured, but only managed over time. Anorexia nervosa is characterized by low body weight, inappropriate eating habits and obsession with having a thin figure. Individualssuffering from it may also practice repeated weighing, measuring, and mirror gazing, alongside other obsessive actions, to make sure they are still thin, a common practice known as "body checking".[4]Anorexia nervosa is often coupled with a distorted self image[5][6] which may be maintained by various cognitive biases[7] that alter how the affected individual evaluates and thinks about her or hisbody, food and eating.[8] Anorexia nervosa is characterized by the fear of gaining weight. Those suffering from this disorder often view themselves as "too fat" even if they are already underweight.[9]Persons with anorexia nervosa continue to feel hunger, but deny themselves all but very small quantities of food.[8] The average caloric intake of a person with anorexia nervosa is 600–800 caloriesper day, but extreme cases of complete self-starvation are known. It is a serious mental illness with a high incidence of comorbidity and similarly high mortality rates to serious psychiatric...