Introduction There are many ways to take tobacco. You can chew it, inhale it through the nose, and smoke it in the form of cigars or cigarettes. No matter how it’s taken it is dangerous, but because smoking is the most popular way to consume tobacco it has also received the greatest attention from the medical field and the media. When a smoker inhales a puff of cigarette smoke the large surface area of the lungs allows nicotine to pass into the blood stream almost immediately. It is this nicotine “hit” that smokers crave, but there is a lot more to smoke than just nicotine. In fact, there are more than 4000 chemical substances that make up cigarette smoke and many of them are toxic. Cigarette smoke is composed of 43 carcinogenic substances and more than 400 other toxins that can also be found in wood varnish, nail polish remover, and rat poison. All of these substances accumulate in the body and can cause serious problems to the heart and lungs.