Most nano-hydroxyapatite toothpastes look identical on the front of the tube. The real differences are on the back, and the number that matters most is the one most brands never print. Here's what to look for when comparing nHA toothpastes: disclosed concentration, how the formula is manufactured, and what each brand is willing to put on the label.

MSM or, methylsulfonylmethane, is an organic compound that is naturally found in cruciferous vegetables, meat, eggs, and even a little in our bodies.