Naturally occurring Fluoride and man-made Fluoride are totally different - you might want to research it.
It amazes me that, with this incredible tool - the Internet - at our fingertips and it's capacity to bring the knowledge of the world to our laps - that so few use it.
I remember reading that there was a deal made to get rid of the large amount of man-made by-product of some manufacturing process (?) ~ fluoride, by selling the idea of health benefits of adding it to public water supplies. There was no place for this company to dispose of their huge amount of fluoride. Don’t have the source, but I remember reading it online somewhere. I use toothpaste without fluoride now. Tom’s of Maine.