Study: Smoking Cessation Adds 10 Years to Life
A study of more than 1 million women finds that quitting smoking can extend life by 10 years.
Those who were able to kick the habit by age 30 avoided 97-percent of the excess risk of premature death.
The health risks for those who continued to smoke after age 40 were 10 times bigger.
Because women born around 1940 were the first generation to smoke, doctors are now able to see the full extent of smoking's effect on the mortality of an average lifespan.