Cigarette smoke contains more than 7,000 chemicals and chemical compounds, many of which are toxic or carcinogenic (i.e., cause cancer). Smoking is one cause of dangerous plaque buildup inside your arteries. Plaque is made of cholesterol and scar tissue. It clogs and narrows your arteries. This can trigger chest pain, weakness, heart attack, or stroke. Plaque can rupture and cause clots that block arteries. Completely blocked arteries can cause sudden death.

Fortunately, people who stop smoking can greatly reduce their risk for disease and premature death. And the younger you are when you quit, the better your chance for avoiding these problems. So don't wait!

• lowers the risk for lung and other types of cancer.
• reduces the risk for coronary heart disease, stroke, and peripheral vascular disease.
• reduces respiratory symptoms, such as coughing, wheezing, and shortness of breath.
• reduces the risk of developing chronic obstructive pulmonary disease (COPD), one of the leading causes of death in the United States.
• reduces the risk for infertility among women during their reproductive years. Women who stop smoking during pregnancy also reduce their risk of having a low birth weight baby.

If you quit smoking, you will also help protect your children, family, and friends from exposure to secondhand smoke that can cause immediate harm to the nonsmokers who breathe it.