What is the BMI threshold for anorexia?

The threshold for diagnosing anorexia nervosa is defined by a Body Mass Index (BMI) of less than 18. This measurement indicates a significantly low body weight in relation to height and is a key criterion for identifying the disorder. Anorexia is characterized by an intense fear of gaining weight and a distorted body image, leading individuals to strive for an unhealthy weight level which can lead to serious health complications.

A BMI below 18 is clinically important because it reflects a state of malnourishment and increases the risk for many health issues, including heart problems, weakened immune response, and other life-threatening conditions. By utilizing this BMI threshold, healthcare professionals can recognize the severity of the eating disorder and implement appropriate treatment interventions.