Tobacco use, especially smoking, is the number-one preventable cause of death and disease in the United States.⁴ One out of two people who continue to smoke will die early because of their smoking.

Everyone who uses tobacco would benefit from quitting. The earlier you quit using tobacco, the greater your chance of reversing the risk of tobacco-related diseases.

When you quit smoking-no matter how old you are-you will decrease your risk of:

• Heart attack and stroke. Smoking even a few cigarettes a day (1 to 4) increases your risk of coronary artery disease. If a person who smokes has a heart attack, his or her risk of sudden death is twice as great as the risk of a person who does not smoke.⁵
  • As soon as you quit smoking, your risk of heart attack and stroke begins to decrease. If you already have coronary artery disease, your risk of a second heart attack and possible sudden death decreases when you quit smoking. Use this tool to find out your risk of having a heart attack: Interactive Tool: How Does Smoking Increase Your Risk of Heart Attack?
  • People who quit smoking before age 50 reduce by half their risk of dying in the next 15 years compared with continuing smokers.⁶
• Lung cancer and other lung diseases. After 10 years of not smoking, your risk of lung cancer is reduced by 30% to 50%. If you have asthma, you may have fewer and less severe asthma attacks. You will also have fewer respiratory illnesses, such as colds, flu, and pneumonia.
• Other cancers. After you quit, your risk for developing cancers of the voice box (larynx), mouth, throat, esophagus, intestines, bladder, kidney, and pancreas gradually declines.
• Impotence and fertility problems. Men who quit smoking are less likely to develop problems achieving and maintaining an erection. Women who quit smoking are less likely to have problems becoming pregnant.
• Gum disease and other dental problems. Smoking can lead to gum (periodontal) disease. People who smoke are twice as likely to lose teeth as people who do not smoke.
• Early death. No matter how old you are or how long you've been smoking, quitting reduces your risk for developing life-threatening health problems. Use this tool to find out how much smoking decreases your life span: Interactive Tool: How Does Smoking Affect Your Life Span?

In addition to reducing your risk of diseases in the future, you will notice some immediate benefits after you stop using tobacco. Your shortness of breath and asthma symptoms will likely get better within the first 2 to 4 weeks after you quit. On the other hand, you may temporarily cough more in the first week after you quit because your lungs are trying to clear themselves.

• Health risks for your family members caused by secondhand smoke are reduced when you quit smoking.
• Underweight babies and problem pregnancies are less likely in women who quit smoking.