Jim, the posts do seem to run in cycles. It's almost like a SOAP on TV. You can stop watching for a year and get right back into some of the same old discussions.
Mitch, "The results of the many experiments by Walford and Weindruch were summarized in their book The Retardation of Aging and Disease by Dietary Restriction
(1988) (ISBN 0-398-05496-7
The findings have since been accepted and generalized to a range of other animals."
From Calorie Restriction with Optimum Nutrition (CRON) - The Longevity Diet.
"Calorie Restriction Extends Life
The life-extending effect of reduced calorie diets was reported in 1935 along with the observation that CR stunted body size. Since then, CR has been proven to extend the average and maximum life span for many species including yeasts, worms, mice, rats, etc. Animal experiments on calorie restriction after maturity indicate that adult-onset CR also increases longevity. Experimental animals have the advantage that they are kept in sanitary cages, given regular meals, and not subjected to stress, infectious diseases, accidents, and predation that would reduce their life span in the wild. Many mechanisms have been proposed to try to explain why CR increases life span. Studies at the molecular level have shown that several genes in the sirtuin class, including SIRT1, SIRT3, and SIRT4, create enzymes that increase the activity of the mitochondria and slow the cell's aging process. Many years of study and experimentation will be required to elucidate the complex molecular processes that result in longevity and, also perhaps, to develop nutritional supplements that extend lifespan without having to suffer the rigors of hunger. There has not been sufficient research to determine if humans on calorie restricted diets will live longer, but preliminary observations of the physiological changes caused by CR indicate that life-extending effects will probably be observable in humans also. "
This is now being proven in Human studies as well...
Calorie Restriction Leads Scientists to Molecular Pathways That Slow Aging, Improve Health
This is not new science. It has been proven in many species and has recently been shown to have great effect on humans too.