Body Mass Index, commonly known as BMI, is a quick, easy-to-calculate tool widely used to gauge whether an individual has a healthy body weight. Created in the 19th century by Belgian mathematician Adolphe Quetelet, it is a simple formula: a person's weight in kilograms divided by the square of their height in meters (kg/m2). Despite its prevalent use in clinical and health fields, the usage of BMI as a primary indicator of health has increasingly come under scrutiny.