What does a BMI of less than 18.5 signify?

A Body Mass Index (BMI) of less than 18.5 signifies underweight status. BMI is a numerical value derived from an individual's weight and height, which is used to categorize individuals into different weight status categories.

When a person's BMI falls below 18.5, it indicates that they have a lower body weight relative to their height than what is considered healthy. This measurement is important as being underweight can be associated with various health risks, including nutrient deficiencies, weakened immune function, and other medical conditions that might arise from inadequate body mass. Understanding BMI and its implications can help healthcare professionals and individuals address potential health concerns related to body weight.