A site called The Daily Green has an article on what to look for in natural toothpastes.
It’s important to note that just because a product is sold at a natural foods store, it doesn’t mean that its ingredients are all natural. In many of the “natural” toothpastes we tried, we found not-so-natural ingredients.
Nearly all of the ones we reviewed contained sodium lauryl sulfate, a cleansing agent that creates lather. While not considered toxic, it’s known to cause microscopic tears in mouths that can lead to canker sores.
There’s quite a bit more information over there and plenty of links to legitimate natural toothpastes.
Be sure to check it out, and let me know if you’ve tried any natural dental care products next time you’re in the office.