Basically the point is that you have to kill the acid-producing bacteria in your mouth so that cavities wont form. We all know bacteria produce acid which erodes enamel away and forms cavities. Sugar is their food source, as well as refined carbs. So, get rid of the bacteria, and we should be good.
Also re-mineralization is possible on a microscopic scale so we need to topically apply these minerals to allow for bonds to form. One thing I have been iffy on is that glycerin appears to coat your teeth and prevent this remineralization. Even Tom's has glycerin in it. Yet another reason to make your own.
2 T baking soda
1 T salt
1 T xylitol
1/2 T aluminum free baking soda (this has calcium carbonate in it)
2 t fennel powder (for flavor, not neccesary)
1 t prickly ash bark
Mix this then wet your brush and dip it into the powder and brush for two mins (after flossing!). I follow this with a 50/50 hydrogen peroxide/water rinse then use ACT mouthwash (for the fluoride).
I added the bay leaf for looks and flavor, you dont need to.
You can alter the recipe too, I added a little more xylitol for sweetness so play around with it! Enjoy!