As much as we focus on food and fitness as the "physical" arbiters of health and longevity, there appears to be much more to it. In fact, most research fails to find any grand commonalities in the diet and fitness patterns of the longest lived.
Want to live a long time? Who doesn't? Quite a number of smart people have staked their hopes for long life on restricting their calorie intake. It's an idea that rests on a not-inconsiderable body of evidence. But some new developments suggest it may be a questionable strategy.