"My daughter was breastfed for the first 2 years of her life. She never received infant formula with water. Her toothpaste does not contain fluoride and she has never received fluoride treatments of any kind. She is currently 3, almost 4, and is a big water drinker. She drinks filtered water throughout the day and has dental fluorosis. It never occurred to me that despite the fact that she has not really been exposed to it in other forms, the fluoride in our water supply could still damage her teeth. I've only recently really been researching the damaging effects of fluoride and can only hope we can afford a fluoride filter soon."
(Note: not all filters will take fluoride out of the water)