Humble, earthy tooth powder, sleek toothpaste’s understated older cousin, is edging in on the dental-care scene as a newly popular (but not-really-so-new) option. If you’re not a fan of fluoride or ...

Toothpaste made from your own hair may offer a sustainable and clinically effective way to protect and repair damaged teeth. In a new study, scientists discovered that keratin, a protein found in hair ...