the scientific evidence for higher mortality for overweight BMI may go back decades - but online evidence is limited
The story is simple: That it's well-established scientific fact that being "overweight"--that is, having a body mass index figure of between 25 and 30--is, in the words of Harvard professors Walter Willett and Meir Stampfer, "a major contributor to morbidity and mortality."
According to this line of argument, there's simply no real scientific dispute about the "fact" that average-height women who weigh between 146 and a 174 pounds, and average-height men who weigh between 175 and 209 pounds, are putting their lives and health at risk.
t's difficult to exaggerate the extent to which the actual scientific evidence fails to support any of this. In fact, the current evidence suggests that what the Harvard crew is saying is not merely false, but closer to the precise opposite of the truth. For the most part, the so-called "overweight" BMI range doesn't even correlate with overall increased health risk. Indeed "overweight," so-called, often correlates with the lowest mortality rates.