Some people who get lung cancer do not have any known riskfactors. Although we know how to prevent most lung cancers, at this time we don't know how to prevent all of them. The best way to prevent lung cancer is not to smoke. You should also avoid breathing in other people's smoke. If you would like help quitting smoking, see our Guide to Quitting Smoking or call us at 1-800-227-2345. 

Radon is also a cause of lung cancer. You can lower your exposure by having your home tested and treated, if needed. To learn more, see our document, Radon.

Protecting yourself from cancer-causing chemicals at work and elsewhere, can also be helpful. When people work where these exposures are common, they should be kept as low as possible.

A good diet with lots of fruits and vegetables may also help prevent lung cancer.

Last Medical Review: 11/03/2009
Last Revised: 11/03/2009