BMI is a very crude measure. It is only useful in the extreme, and not particularly relevant for an individual. If you have a BMI of 40 you should think about l

BMI is a very crude measure. It is only useful in the extreme, and not particularly relevant for an individual. If you have a BMI of 40 you should think about losing weight, but exactly nobody need a composite number to know they are that fat. Similarly, you might have a normal BMI but an LDL of 300 or a strange lump on your thyroid. These things are vastly more important than your BMI