"Bulimia nervosa is often under-diagnosed because many people who experience this illness may be of normal weight (or even overweight), as opposed to individuals with anorexia nervosa. The typical age of onset for bulimia nervosa is late adolescence or early adulthood, but onset can and does occur at any time throughout the lifespan. Like other eating disorders, bulimia nervosa mainly affects females, although at least one in 10 individuals with this condition is male. Bulimia nervosa is more common than anorexia nervosa and likely occurs in up to three percent of the population. Like all mental illnesses, Bulimia nervosa is found in all racial, religious, ethnic and socioeconomic groups."