don't be too skinny

A few extra pounds can add years to your life: study

Carrying a little extra weight may actually be good for you, according to a Canadian study that showed a few pounds appear to protect people from an early death.

Researchers found that while underweight and extremely obese people die earlier than people of a normal weight, people who are slightly overweight actually live longer than those of a normal weight.

[...] The study was based on examining the relationship between body mass index and death among 11,326 adults in Canada over a 12-year period using data from the National Population Health Survey.

During the study period, from 1994/1995 through 2006/2007, underweight people were 70 percent more likely than people of normal weight to die, and extremely obese people were 36 percent more likely to die.

But overweight individuals were 17 percent less likely to die. The relative risk for obese people was nearly the same as for people of normal weight.

The researchers said this was the first large Canadian study to show that people who are overweight may actually live longer than those of normal weight. An earlier study, conducted in the United States and published in 2005 in the Journal of the American Medical Association, showed similar results.