BMI is a reliable indicator of total body fat, which is related to the risk of disease and death. The score is valid for both men and women but it does have some limits. The limits are:It may overestimate body fat in athletes and others who have a muscular build. It may underestimate body fat in older persons and others who have lost muscle mass.
The ABSI is another measure of risk but it takes into account waist circumference which is extremely important because it helps assess internal fat deposition which is perhaps more important as an indicator of risk than weight.