Jul 16, 2014 — Turns out that for 7,000 years, snacking on nutsedge may have helped people avoid tooth decay. But at some point, the root it lost its charm. By the 1970s, it was branded "the world's worst weed."
Feb 24, 2013 — By examining ancient dental plaque, researchers have concluded that prehistoric humans' diets made for healthier mouths. The addition of flour and sugar to modern diets may have set the stage for a near-constant state of oral disease.