[HIGHLIGHTS] are you fat? You don't need a scale or a meter, just a string to know

Body mass index (BMI) is a number calculated using a person's height and weight. It is used to evaluate whether most people are overweight or underweight.

BMI does not measure the amount or percentage of fat in the body, but researchers have found that it is usually related to the percentage ofFat in the Body. A medical report questions whether body mass index is a reliable measure or whether the method of using it needs to change. The report of the Lancet Commission on Obesity - a collaboration between leading scientists and doctors from around the world - is scheduled to be published in coming months.