Every morning and night, you squeeze a small amount of toothpaste onto your toothbrush. But have you ever wondered what is in toothpaste that makes it clean your teeth? Most toothpastes share common ingredients, both active and inactive. Active ingredients are what help fight cavities and reduce your risk of gum disease. The inactive ingredients give the toothpaste its taste and texture. They may not take an active role in protecting your teeth from cavities or disease, but without them, toothpaste just wouldnt be the same.