EARTHPASTE
It's not as bad as you might think.
We got the peppermint flavor, and it's actually kind of nice. It has a short ingredient list, just Redmond clay, essential oils, salt, and xylitol. It doesn't get much more natural than that! This stuff works really well, it gives me that "just went to the dentist" feeling but it doesn't foam like regular toothpaste. I'm going to try to make my own version when I run out because this ain't cheap! It's something like six dollars a tube, depending on where you get it. I got mine online from Swanson health.
The downside to this toothpaste is that it's grey. It looks like an earthworm on your toothbrush.