Interesting that fluoride is found even in fossils. I guess the question is if the fluoride in bones is just incidental, or if it is necessary.
I wish I hadn't overused fluoride toothpaste for most of my life, that probably led to the over brittleness which in turn led to chipped (for no apparent reason) teeth.
It is supposed to lend to the hardness of the bones, but in modern times, we get more than enough, I am sure. Kids would sure get enough with some grape juice now and then, or if they ever drank instant tea! YUK Scary