Two subtypes of Anorexia Nervosa exist: the restricting subtype and the binge-eating/purging subtype. Individuals with the restricting subtype maintain their low body weight by significantly limiting their food intake. In the binge-eating/purging subtype, individuals restrict their food intake and routinely engage in binge-eating and/or purging behaviors. These behaviors may include self-induced vomiting, compulsive exercise, and abuse of laxatives, diuretics or enemas. Restriction of energy intake relative to an individual’s requirements leads to a significantly low body weight that can cause severe medical complications.