BMI and Risk of Death

20-24.9: Healthiest BMI for longevity according to an NIH study

15-18.5: Underweight BMI range associated with a 47 percent higher risk of death over 10 years

30-34.9: BMI range associated with a 44 percent higher risk of death

40-49.9: BMI range associated with a 250 percent higher risk of death

With every five unit increase in BMI over 24.9 comes a 31 percent increase of death

It is worth noting that BMI is a flawed measure of cardiovascular wellness (it doesn’t account for body fat percentages or frame size but rather uses a crude height/weight ratio), but there is a certain compelling quality to the law of averages laid out by this study, which followed 1.5 million people for a decade.