What BMI classification indicates a risk of being underweight?

A Body Mass Index (BMI) classification of below 18.5 kg/m² indicates that an individual is considered to be underweight. This threshold is recognized by health organizations as a point where individuals may experience health risks associated with low body weight. Being underweight can lead to various health problems such as nutrient deficiencies, weakened immune function, and potential complications in overall health and wellness.

Understanding BMI classifications is essential for evaluating body composition and health status. The ranges reflect different levels of weight in relation to height and indicate various health implications. For instance, the range of 18.5-24.9 kg/m² is categorized as normal weight, while higher ranges correspond to overweight and obesity categories which can also lead to health risks but differ significantly from the risks associated with being underweight.