Aging at a cellular level can be reversed by living a healthy lifestyle, according to a study by Dean Ornish of the Preventive Medicine Research Institute in Sausalito, Calif. The 10 men in their early 60s who were studied followed a regimen of meatless eating, exercise and meditation, and were able to regrow telomeres that protect chromosomes when cells divide. Subjects who maintained their usual lifestyle saw their telomeres shrink. "In a biological sense, they are getting younger, but what the long-term implications are we don't know," Ornish said.
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