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By Mark Stibich, Ph.D., About.com Guide to Longevity

How To Make Monkeys Live Longer

Monday July 13, 2009
For 20 years, researchers have been studying the effects of feeding monkeys a reduced calorie diet. In short, they give some monkeys about 30% fewer daily calories than others. The result? Healthy aging. In fact, the high cal monkeys were three times as likely to die from cancer, heart disease or diabetes. Basically, fewer calories means slower aging.

In the study, researchers led by Richard Weindruch at the University of Wisconsin in Madison, found that after 20 years of study, half the "high-cal" monkeys had died compared to 20% of the "low-cal" monkeys. The average life span for the monkeys in the study (rhesus monkeys) is 27 years. It seems calorie restirction works by fending off the diseases and problems of aging.

More on Calorie Restriction

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