Final answer:
A healthy BMI, as defined by the NIH and WHO, ranges from 18 to 24.9 kg/m². A BMI below 18.5 kg/m² is underweight, between 25 and 29.9 kg/m² is overweight, and over 30 kg/m² is obese.
Step-by-step explanation:
According to standards issued by the National Institutes of Health (NIH) and the World Health Organization (WHO), a healthy body mass index (BMI) is between. The BMI is a measure of relative weight based on an individual's mass and height. It's formulated as a person's weight in kilograms divided by the square of their height in meters (kg/m²). The normal, or healthy, BMI range is categorized between 18 and 24.9 kg/m².
A BMI under 18.5 kg/m² is generally viewed as underweight, while a BMI between 25 and 29.9 kg/m² indicates that an individual is overweight. Obesity is typically diagnosed when a BMI exceeds 30 kg/m². It's important to highlight that while BMI is a common tool for assessing body weight in relation to the risk of disease, it has limitations, such as not differentiating between muscle and body fat. Other health markers should also be considered when assessing an individual's health status.