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 ...

Add Yahoo as a preferred source to see more of our stories on Google. A close up of someone smiling. At-home teeth whitening kits or toothpastes are great for getting a whiter smile at home without ...

We independently evaluate all of our recommendations. If you click on links we provide, we may receive compensation. Our winner is Colgate Sensitive Prevent and Repair toothpaste Barbara Bellesi Zito ...

Purple toothpaste isn't actually whitening your teeth — it's using color theory to cancel out the yellow. Purple sits opposite yellow on the color wheel, so Hismile's "color correcting serum" is ...

Read on for the best at-home teeth whitening products--think Colgate, Crest and Luelli--that tackle everything from lingering coffee stains to everyday dullness.

Toothpaste is part of most everyone’s daily routine and the right kind is important for healthy teeth. For a product you spit out, there’s a lot to consider. The drugstore aisle is filled with an ever ...