Calorie restriction (CR)adherents claim it’s the only diet that has been proven to extend healthy life span in mammals such as mice and primates, and provides numerous secondary health benefits, such as a far lower risk for most of the degenerative conditions of aging. The degree to which CR can extend the maximum healthy human life span is open to debate, but the evidence for at least some healthy life extension is compelling. Read further on Calorie Restriction
It’s called Undernutrition
“The only approach scientists have found to reliably increase longevity in mammals is to reduce an organism’s caloric intake by about one-third, although the life span of some cold-blooded species can be extended by environmental temperature reduction. Called “undernutrition without malnutrition,” caloric restriction has been shown to extend both the maximal and average life spans of worms, insects and mice. Scientists are now trying to determine if and how caloric restriction works in primates. And though knowledge about its efficacy in humans is still developing, researchers are probing caloric restriction’s physiological effects to understand how we might slow the aging process or confront age-related diseases and conditions. From Ageing Info
Does this mean semi-starvation? We will need to cut back on food at any rate. Over the past few years, the world’s population has continued on its remarkable transition path from a state of high birth and death rates to one characterized by low birth and death rates. At the heart of that transition has been the growth in the number and proportion of older persons. Such a rapid, large and ubiquitous growth has never been seen in the history of civilization.
The current demographic revolution is predicted to continue well into the coming centuries. Its major features include the following:
One out of every ten persons is now 60 years or above; by 2050, one out of five will be 60 years or older; and by 2150, one out of three persons will be 60 years or older.
The majority of older persons (55 percent) are women. Among the oldest old, 65 percent are women.