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Don't Smoke

Quitting smoking is perhaps the single most important thing you can do for your health—and your life span. A study published in the American Journal of Public Health found that women who quit smoking by age 35 add roughly six to eight years to their lives.

It’s never too late to kick the habit. Quitting can slow disease and increase survival odds even in smokers who have already caused significant damage to their lungs, like those with early lung cancer or COPD.

(Getty Images)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.

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