Add Yahoo as a preferred source to see more of our stories on Google. How does purple toothpaste work? It uses color theory’s principle of complementary colors. Complementary colors are shades that ...

The shift from basic white or gel toothpastes to a variety of modern options has made the simple act of brushing teeth more complicated. The three popular types of toothpaste available today are white ...

I've never met someone who didn't wish their teeth were whiter. But, let's be honest, our teeth are easy to neglect. When was the last time you remembered to floss? I haven't been super into my smile ...