Fatties can say whatever they want, but as science tells us: "Although not a   7000  perfect measure of adiposity, BMI is a strong predictor of overall mortality both above and below the apparent optimum of 22.5 kg/m2. There is a progressive increase in all cause mortality above this range which is due mainly to vascular disease. Each 5 kg/m2 increase in BMI is associated with about 30% higher overall mortality."