Calorie reduction tied again to human longevity

I've read and read about the daily ritual of caloric restriction and have been fascinated by what I read. In the case of many people with an ultra-conscious habit about monitoring what they eat, the reduction of calories (but not nutrients) is supposed to be a ticket to a longer life.

A new study confirms that, and scientists say they now know what caloric reduction prolongs lives. The conclusion: that the link between food restriction and longevity may stem from being a molecular response to the stress from cutting back calories.

In effect, the stress from cutting back on calories preserves cellular function in our cells, which gives us the enhanced ability to fight off age-related diseases. Who knew stress could be so useful?