I don't know if any of that is true. But I can say that moderation is a safer way to live. I have used fluoride toothpaste about twice a week, and unfluoridated rain water for drinking. Then I use baking soda tooth paste the rest of the time. I don't want to shun it entirely because it might be of benefit. If it is benefit, I'll still be better off than those who shun it entirely and if it is of detriment I'll be better off than 99% of people who use it once or twice daily. I use this principle for lots of things in life, since knowing what is true is difficult business.