So I grew up without Fluoride in my water. We had well water. I am about to get my first root canal at nearly 55. What is that proof of? Overall nothing other than I took overall good care of my teeth. Roughly 27% of Americans do not have fluoride in their water the rural area I lived in offered weekly fluoride treatment for kids when I was young. If I am correct we have tracked prenatal health to being one of the absolute biggest contributors to tooth health and decay. But Fluoride is one of the biggest aids in keeping teeth healthy as we age and we have known that for decades.

The "science" used to say we shouldn't do it is malarkey generally speaking. The biggest on I hear is it lowers children's IQs. The studies on lower IQs in children associates Fluoride levels over twice what we put in water as where the impact starts and this is in places like rural India and China. Like all things, it is about how much. Almost universally, too much of a good thing often leads to negative effects and not enough also leads to negative effects. This is every day science folks.