This has been an emotionally charged issue since I first entered dentistry in the late 50's. It is well beyond the scope of a post to debunk the myths and fear tactics of the antifluoridationists. Let me simply state that the benefits of fluoride were discovered somewhat accidentally when someone noticed that the incidence of dental caries (decay) was markedly lower in a few areas of the USA. Further study identified fluoride in the water supply as the reason. These areas containing the fluoirde naturally have been studied to exhaustion and there is no other difference in the health of residents than healthier teeth. The optimum concentraion of fluoride is one part per million parts of water. When the concentration rises to 4 + ppm there is danger of mottled enamel. IIRC only one of the areas where fluoride occurs naturally has such high concentrations. I am a proponent of integrated (alternate plus conventional) medicine and my children received fluoride supplements as my grandchildren do currently. I am entirely comfortable with this !!!! During my term of dental practice I witnessed the incredulous reduction in dental caries as the result of fluoride supplementation. A final word of counsel, check the level of fluoride, if any, added or indigenous in your water supply and adjust the level of supplementation accordingly. Regards, Lou