The Benefits of Quitting Smoking Almost everyone knows that smoking is bad for you but do you know all the benefits of quitting? What are the health benefits of quitting? For the vast majority of smokers, quitting smoking is the best single thing they can do to improve the length and quality of their lives. Persons who quit smoking immediately begin to reduce their chances of developing heart disease, cancer, breathing problems, infections, or being in an accident. Former smokers also live longer than those who continue to smoke. For example, those who quit before age 50 have only half the chances of dying in the next 15 years compared with those who continue to smoke. Women who stop smoking before pregnancy or early in their pregnancy reduce their chances of having a low birth weight baby. Quitting can also reduce the chances of stillbirth, early infant death, and improve the health of the woman.