Lighter Meals May Bring Longer Life

"Studies in humans can be done but they're not going to address longevity and it's a self-selected group," he said. "Monkeys are the closest we can get."

The findings come a day after U.S. researchers reported in Nature that rapamycin, a drug typically given to transplant patients, significantly extended the lifespans of mice.

More information

For more on various aspects of growing older, head to the U.S. National Institute on Aging.

SOURCES: Richard Weindruch, Ph.D., professor, medicine, University of Wisconsin-Madison and investigator, Veterans Hospital, Madison, Wis.; Felipe Sierra, Ph.D., director, biology of aging program, U.S. National Institute on Aging; Marianne Grant, registered dietitian, Texas A&M Health Science Center Coastal Bend Health Education Center, Corpus Christi, Texas; July 10, 2009 Science

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