Interesting.
The new study began several years ago when the investigators used national data to look at death risks according to body weight. They concluded that, compared with people of normal weight, the overweight had a decreased death risk and the underweight and obese had increased risk.
Read the rest of the New York Times Health section article to get more unexpected information about weight and longevity:
http://tinyurl.com/36kjbw.
I wonder if this will have any effect on what doctors consider "optimal" weight versus "overweight" as was mentioned in the article, and lead to an end or alteration of society's obsession with the ideal of extreme thinness.