I use fluoride only until my children can handle the mint taste of the non-fluoride toothpaste. I've read WAY too much about the negative effects of fluoride. Unfortunately, I can't do much about the water. :glare: Check out http://thehealthyhomeeconomist.com -- she has a very interesting article on how cavities can be healed (and prevented.) Apparently, it has much more to do with your diet than in cleaning habits.