Katherine Sara on Instagram: "nontoxic toothpaste recipe: most toothpastes are filled with chemicals you’d never want in your mouth daily. here’s how i make my own nontoxic version, using calcium carbonate, bentonite clay, baking soda, coconut oil, peppermint, a little hydrogen peroxide, and calcium phosphate. it whitens, freshens, and even helps remineralize without the toxins."