Cut Calories and Lengthen Your Life.

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Cut Calories, Lengthen Life Span?

Study found middle-aged adults who reduced their intake showed slower biological aging

By Robert Preidt
HealthDay Reporter - WebMD.com

Limiting calorie intake may slow aging, a new study suggests.
Previous research has shown that calorie restrictions slow aging in worms, flies, and mice, so Duke University researchers wanted to see if it could slow biological aging in people.

"Biological aging is the gradual and progressive deterioration of systems in the body that occurs with advancing chronological age," said study author Daniel Belsky, an assistant professor of medicine at Duke, in Durham, N.C.

"If we can intervene to slow the rate of biological aging, it may be possible to prevent or at least delay onset for many age-related diseases and disabilities," he explained in a university news release.

The researchers looked at 145 people who achieved a 12 percent reduction in calorie intake over two years and a control group of 75 people who did not restrict calories. 

At the start of the study, the average biological age of participants in both groups was 37, and their chronological age was close to that at 38. Biological age was calculated by readings that included total cholesterol, blood pressure, and hemoglobin levels.

During two years of follow-up, biological age increased an average of 0.11 years each 12 months in the calorie restriction group and an average of 0.71 years each 12 months in the control group. This was a statistically significant difference, according to the researchers.

"Ours is the first study to test if caloric restriction can slow measured biological aging in humans in a randomized setting," Belsky said.

"Our findings suggest a template for developing and evaluating therapies designed to mimic the effects of caloric restriction to ultimately prevent chronic diseases," he added.

This doesn't mean that you have to be on a perpetual diet. It's proven that if you eat the same amount of healthy food as the food you eat now, you'll be consuming fewer calories. When I switched to the Mediterranean diet one of the advantages was that you don't have to count calories. You could eat all you want as long as you stuck to the foods in the food pyramid. My doctor was happy with the new diet, but he did suggest I only eat nonfat dairy.

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