Originally Posted by woj

"In 1986, Weindruch reported that restricting the calorie intake of laboratory mice proportionally increased their life span compared to a group of mice with a normal diet. The calorie-restricted mice also maintained youthful appearances and activity levels longer and showed delays in age-related diseases."

"Results published in 2009 showed that caloric restriction in rhesus monkeys blunts aging and significantly delays the onset of age related disorders such as cancer, diabetes, cardiovascular disease and brain atrophy. 80% of the calorically restricted monkeys were still alive, compared to only half of the controls."

http://en.wikipedia.org/wiki/Calorie_restriction