Smokers not only have increased risk of lung disease, including lung cancer and emphysema, but also have increased risk of heart disease, stroke, and oral cancer.

When you smoke, toxins are carried by your blood to every organ in your body. At the same time, the carbon monoxide in cigarette smoke keeps red blood cells from carrying as much oxygen as normal.

Although people generally gain weight when they stop smoking, you can reduce your chances of adding extra pounds by taking steps to prevent it.