Any treatment that is added to water to treat the masses should be done with the utmost care. There really exists no medication or supplement that is tolerated by everyone. Aspirin, Tylenol and even a simple B12 vitamin may cause problems with some individuals. When a potential toxicant is added to the water, it will be hard, if not impossible, to track those who are sensitive to the material. If fluoride is helpful to the teeth, it should be applied directly to the teeth. Placing fluoride in the water makes it available to all of the tissues where it really is not wanted, in the rest of bones, the nervous system and the thyroid gland. At least there should be greater research and knowledge of what symptoms to look for with fluoride toxicity in those who are most sensitive. Adding nutrients or drugs to the water supply is a quick way to supply the masses. It also poses the potential to harm many who do not tolerate the given additive. In this case, the best scenario would be to supply fluoride in the safe, targeted manner that does not harm the rest of the body.