What are the key criteria for diagnosing anorexia nervosa?

The key criteria for diagnosing anorexia nervosa include amenorrhea (the absence of menstruation), an intense fear of gaining weight, and significantly low body weight. These elements reflect both the psychological aspects and the physical manifestations of the disorder.

Amenorrhea is often observed in individuals with anorexia nervosa due to the body’s response to severe weight loss and malnutrition, impacting hormonal balances. The intense fear of gaining weight suggests a distorted body image and an irrational perception of self, which are central to the diagnosis. Low body weight criterion is assessed by considering the individual's weight in relation to expected norms for their age and height.

This combination of psychological and physical symptoms distinguishes anorexia nervosa from other eating disorders and ensures that the diagnosis is accurate and comprehensive. Other options present criteria that do not align with the established understanding of anorexia or include features of other eating disorders, which is why they do not fulfill the diagnostic requirements.