Only one intervention has been proven to extend both the average and maximum lifespan of all animal species tested: reducing the consumption of dietary calories, or caloric restriction (CR). While widely recommended, exercise and nutritional supplementation have not been shown to extend maximum lifespan. Because CR extends maximum lifespan, scientists believe it actually slows the process of aging. CR is therefore used as a means to study the process of aging…..More detail
SOURCE/REFERENCE: http://www.ultrahiq.net/Ubiquity/Winter02/CR.html