Is it Possible that Lifestyle and Health Behaviors can affect the Aging Process? Image from: http://www.freedigitalphotos.net

Many people feel life expectancy is all in our genes and the aging process is little affected by our living habits. However, several scientific studies have looked at the aging processes of twins who were reared together and apart to see what contributions genetics vs. living habits had toward longevity. In two famous twins' studies it was found that aging was less related to genetic factors than to lifestyle and health behaviors. With the results of these studies we can with a fair amount of confidence feel that we can affect the aging process with our lifestyles and health habits.

No one entirely understands why we age. Many of the theories of why we age propose the biological basis of aging. Many of the theories fit into two categories of aging theory:

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