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  1. Smoking causes stroke and coronary heart disease, which are among the leading causes of death in the United States. 1,3 Even people who smoke fewer than five cigarettes a day can have early signs of cardiovascular disease. 1 Smoking damages blood vessels and can make them thicken and grow narrower.

  2. Smoking tobacco introduces not only nicotine but also more than 5,000 chemicals, including numerous carcinogens (cancer-causing chemicals), into your lungs, blood and organs. The damage caused by smoking can shorten your lifespan significantly. In fact, smoking is the number one cause of preventable death in the United States.

  3. Jan 25, 2019 · Cigarette smoking causes nearly one in five deaths in the United States. It can also cause many other cancers and health problems. These include: Cancers, including lung and oral cancers Lung diseases, such as COPD (chronic obstructive pulmonary disease) Damage to and thickening of blood vessels, which causes high blood pressure

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