Government adds fluoride to your tap water.
Fluoride levels in tap water is toxic for the human body to digest. Fluoride in toothpaste alone is dangerous. But exposing our open pores in a hot shower to constant fluoride water, and drinking fluoride water/tea/soda, and eating vegetables/meat raised on fluoride water……do you see were i am getting at. Basic knowledge from what we learned from DDT and how the concentration increases thru the food chain, the same is true of the heavy metal that is fluoride.
But don’t trust me Do your own research. And appeal to your state to have clean h20.
Fun Fact: Nazis used fluoride to dumb down the prisoners.