How does smoking or tobacco use increase someone’s risk for developing cancer?

Smoking is the No. 1 risk factor for developing lung cancer, according to the Centers for Disease Control and PreventionOff Site Icon (CDC). Other tobacco use also increases the risk of lung cancer.

Tobacco smoke is a mix of more than 7,000 toxic chemicals, many of which are poisonous, and at least 70 of which are known to cause cancer, according to the CDC.

Smoking is linked to about 90 percent of lung cancers in the U.S., according to the CDC, and people who smoke are 15 to 30 times more likely to get lung cancer or die from lung cancer than people who don’t smoke.

For more information about how smoking and tobacco use cause lung cancer, talk with your doctor.

Learn more: