This paper is important because it is the first study in humans that strongly suggests that calorie restriction may delay primary aging.

We know people on calorie restriction will lose weight. But this study isn't a weight-loss study. We're hoping to learn more about whether calorie restriction can alter the aging process.

This is the first report ever to show that calorie restriction with optimal nutrition may delay primary aging in humans.

I believe the diet has a powerful effect in modulating aging.

Definitely his life expectancy is higher than an average American.

These people are not genetically lucky.

These studies strongly support the need to educate people to make sensible choices when they eat and that they need to exercise and walk more, instead of going by car everywhere.

It's not eating half a hamburger, half a bag of french fries and half a sugared beverage.

Diet and exercise are key factors in preventing chronic diseases and delaying aging.

If you change the quality of your diet by increasing the servings of nutrient-dense food and reducing -- actually, it would be better to slowly eliminate -- all of the servings of 'empty' calorie foods, you improve your chances of living a healthier and longer life.

If you put animals on a 30- or 40-percent calorie-restricted diet, they live 30 to 40 percent longer, and they have much less chronic disease.

The hearts looked 10 to 15 years younger.