Curaprox Black is White Charcoal Whitening Toothpaste contains natural ingredients that remove discoloration without the use of bleach or harsh abrasion. The star of this show? Activated charcoal, which has the ability to cleanse and remove impurities (hence why so many skincare products incorporate it), and your chompers are no exception.

"The most effective way of actually whitening the color of your tooth is with the use of hydrogen peroxide," Lowenberg notes. "But toothpastes with charcoal help remove surface stains effectively." Which makes teeth appear whiter. The toothpaste itself is black, and makes your teeth look like you ate an entire package of Oreos until you rinse, but it makes for a great scare tactic for fellow housemates.

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