Your teeth will be yellow
Chances are you already know this one—all you have to do is look in the mirror. The nicotine in cigarettes deeply stains teeth yellow, and over time can even turn them brown. To make matters worse, the tobacco in cigarettes can lead to gum disease by weakening the soft tissue and bone of your teeth. So not only will your teeth turn dark yellow, they may even fall out over time. Don’t miss these 15 incredible ways your body heals after you quit smoking.