Final answer:
Anorexia Nervosa is an eating disorder where individuals restrict their energy intake, leading to significantly low body weight and severe health risks.
Step-by-step explanation:
Anorexia Nervosa: A Severe Eating Disorder
Anorexia Nervosa is an eating disorder characterized by the restriction of energy intake relative to individual requirements, leading to a significantly lower body weight than what is considered healthy for a person's age, sex, developmental stage, and physical health. Individuals with this condition engage in starvation and/or excessive exercise to maintain a weight well below average, often driven by a distorted body image and an irrational fear of gaining weight. Despite being underweight, they may see themselves as overweight due to a type of body dysmorphia. Anorexia nervosa comes with serious physical and psychological risks, including bone loss, heart failure, kidney failure, reduced gonadal function, amenorrhea, and, in severe cases, death. It is also associated with an increased risk of psychological problems such as anxiety disorders, mood disorders, and substance abuse. This disorder disproportionately affects teenagers and young adults, and is more common in females than in males.