Why can having a purpose in life slow down your aging?

Telomeres, which are sequences of DNA at the end of chromosomes, can provide one way to judge your rate of aging. The longer your telomeres, the more your stem cells can repair damages elsewhere in your body, and the younger you are. People with purposes in life (ones that don't stress them) have much longer telomeres (almost eight years worth longer) than their chronological age and other healthy behaviors would justify - the telomeres seem to be elongated by having that purpose.

Find out more about this book: YOU: Being Beautiful: The Owner's Manual to Inner and Outer Beauty

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