The concept of a nutrient as we know it is recent in human history so naturally it was not known when the idea of mercury for health was common. For thousands of years humans considered mercury as a beneficial substance. Even by your standard of modern thought being the best, the classification of fluoride is non-essential to human life. I was disappointed when your claim that it was essential was nothing but your own opinion.

My previous comment about your escape from a windowless basement was intentionally hyperbolic to be clear it was in jest.

I don't think you're a nurse or any other of the self-proclaimed things you have vacillated between in representing yourself and your opinion.  Not that it matters, anyone reading this conversation thread would most likely come to the same conclusion.

The complete lack of the Internet's fluoride super troll on this thread is something that should make readers take pause, he is drawn into exchanges on fluoride so easily.

Thank you, goodbye.