It's Never Too Late to Quit

20 minutes after quitting: Your heart rate drops.

12 hours after quitting: The carbon monoxide level in your blood drops to normal.

2 weeks to 3 months after quitting: Your circulation improves and your lung function increases.

1 to 9 months after quitting: Coughing and shortness of breath decrease; cilia (tiny hair-like structures that move mucus out of the lungs) regain normal function in the lungs, increasing the ability to handle mucus, clean the lungs, and reduce the risk of infection.

1 year after quitting: The excess risk of coronary heart disease becomes half that of a smoker's.

5 years after quitting: Your stroke risk is reduced to that of a nonsmoker.

10 years after quitting: The lung cancer death rate is about half that of a continuing smoker's and the risk of cancers of the mouth, throat, esophagus, bladder, cervix, and pancreas decrease.

15 years after quitting: The risk of coronary heart disease is that of a nonsmoker's.