What is the normal BMI range for adults?

The normal Body Mass Index (BMI) range for adults is set between 18.5 and 24.9. This range is considered to reflect a healthy weight for adults, taking into account both underweight and overweight status. A BMI lower than 18.5 is categorized as underweight, which may suggest nutritional deficiencies or health risks. Conversely, a BMI above 24.9 indicates overweight, and ranges above that can signal varying degrees of obesity, each associated with increased health risks like cardiovascular disease, diabetes, and other chronic conditions.

The numerical range from 18.5 to 24.9 has been established through extensive research on body weight and health outcomes, creating a standard for assessing weight-related health issues in populations. This differentiation helps healthcare providers to identify individuals who may benefit from weight management or related interventions, thus emphasizing the importance of maintaining a BMI within this normal range for overall health.