What does a BMI of less than 18.5 indicate?

A Body Mass Index (BMI) of less than 18.5 indicates that an individual is classified as underweight. This classification serves as a warning that the person's weight is significantly lower than what is considered healthy for their height. Being underweight can suggest that an individual may not be consuming enough calories to meet their body's nutritional needs, which could lead to various health issues, including weakened immune function, malnutrition, and potential complications related to physical health and overall well-being.

A BMI less than 18.5 is often used by healthcare professionals as a guideline for assessing weight-related health risks, and it highlights the importance of maintaining a healthy weight range. This designation is critical for identifying individuals who may need additional support regarding their dietary habits or potential underlying health conditions that contribute to low weight.