Then again, yours truly uses toothpaste with nano-hydroxyapatite, which is touted as a non-toxic version of the same mineral that makes up teeth and bones. Skepticism abounds with that stuff ...

Hydroxyapatite (HAP), safe if swallowed, is an ideal fluoride substitute in toothpaste and mouthwash for people of all ages, including young children, the authors wrote. "More studies now show that ...