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Health Risks of Tobacco Use All forms of tobacco contain chemicals that are dangerous to your health. Tobacco use is the leading cause of preventable death in the U.S. 90 % of adult smokers began when they were teenagers Tobacco is an addictive and toxic drug. Nicotine is the drug found in tobacco leaves It is an addictive drug, which means it causes physical and/or psychological dependence It is a stimulant, which means it increases the action of the central nervous system, the heart, and other organs Poisonous Substances in Tobacco Smoke Tar – a thick, sticky, dark fluid produced when tobacco burns. It damages the respiratory system Makes you more susceptible to disease. Poisonous Substances in Tobacco Smoke Carbon Monoxide – a colorless, odorless, and poisonous gas, which deprives the body of oxygen Cigarette filters do not protect smokers from the more then 50 carcinogens found in cigarettes. Carcinogens are a cancer causing substance Pipes, Cigars, and Smokeless Tobacco Cigars contain more nicotine than cigarettes. Smokeless tobacco is sniffed through the nose, held in the mouth, or chewed. Smokeless tobacco is absorbed into the blood at three times higher the amount than cigarettes. Short-term damaging effects of tobacco use 1. Brain chemistry changes-addictive properties of nicotine cause the body to crave more. 2. Respiration and heart rate increase and endurance decreases. 3. Taste buds are dulled and appetite is reduced. 4. Users have bad breath, yellowed teeth, and smelly hair, skin, and clothes. Long-term damaging effects of tobacco use 1. Chronic bronchitis 2. Emphysema 3. Lung cancer 4. Coronary heart disease and stroke 5. A weakened immune system