More Teeth Whitening Stories That whitening mouthwash and “crystal-diamond-quadruple-white” toothpaste you’ve been banking on? Those are mainly cleaning up stains found on the outer surface ...

But at-home teeth whiteners can make a real difference against common culprits like staining caused by coffee, tea, red wine, soy sauce, or anything else that can stain a white T-shirt.

Because let’s face it—pearly whites are an investment worth protecting! “If it would stain your beautiful white crisp shirt, it can stain your teeth too,” says Dr. Kahng. In other words, if coffee, ...