If you were raised in America, you probably associate fluoride with healthy teeth, but behind the shiny toothpaste tubes and ADA proclamations lies a massive debate that has been raging for years.

While fluoridation of American drinking water may seem like the surest form of preventative medicine — fluoridate kids from birth and they'll suffer fewer cavities later — a growing community of doctors and scientists believe that fluoride is a toxic chemical that should be nowhere near public drinking water.