Have you ever seen those ads for charcoal toothpaste, and wondered if your teeth would legit look whiter, or if they just look white after you clean the charcoal off of them? The charcoal actually has exfoliating power, so it deep cleans without scratching the surface of your enamel. The ingredients are basic, too — so no weird chemicals in here: Charcoal, bentonite clay, and oh yes... peppermint oil, so at least it tastes minty for you.
Also, you'll scare the bejeesuz out of your significant other when you flash them a smile with your black teeth. That alone is worth the $14.