How Tooth Whitening Works

ADA Science Inside: Over time, teeth can go from white to not-so-bright for a number of reasons. Find out what foods can stain your teeth, and learn why your teeth darken with age. Then, watch as Dr. Jane Gillette from the American Dental Association explains how bleaching ingredients brighten your smile and walks through the whitening treatments you can try at home or have done in your dentist’s office.