Will quitting smoking reduce my risk for cancer?

Quitting smoking substantially reduces the risk of developing and dying from cancer, and this benefit increases the longer a person remains smoke-free. However, even after many years of not smoking, the risk of lung cancer in former smokers remains higher than in people who have never smoked.

The risk of premature death and the chance of developing cancer due to cigarettes depend on the number of years of smoking, the number of cigarettes smoked per day, the age at which smoking began, and the presence or absence of illness at the time of quitting. For people who have already developed cancer, quitting smoking reduces the risk of developing a second cancer.

This answer is based on source information from the U.S National Institutes of Health.  
Yes. After 10 years of not smoking, risk of cancer is half that of a person who continues to smoke.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.