With the ten fold increase in mental disease, do you see any connection with the addition of sodium fluoride to drinking water , toothpaste, mouthwash, and God knows what else .I have looked for studies done to see what the effect of long term consumption of this aluminum by product by humans and strangely enough there don't seem to have been any. If it hardens tooth enamel, what about the little arteries that feed the brain?
That falls under the "who knows?" category, but I think that it was not a good idea to add fluoride to drinking water. It was better kept for use safely in dental treatments and perhaps toothpaste. Aluminum has been associated with an increased risk of Alzheimer's.