Here are some links to studies and information from around the world on the poison that is fluoride. The Thyroid and how fluoride inhibits it. http://fluoridealert.org/issues/health/thyroid/ And this by Dr Barry Durrant-Peatfield MBBS LRCP MRCS Medical Advisor to Thyroid UK http://rense.com/general57/flur.htm Fluoride and our IQ http://fluoridealert.org/studies/brain01/ Fluorides effects on tooth health, cavity prevention and bone mineral loss http://fluoridealert.org/studies/ifs/ Who is most at risk of fluoride toxicity http://fluoridealert.org/studies/vulnerable-populations/ The Pro-Fluoridation sides lack of actual evidence http://fluoridealert.org/studies/rct/ News brief of another study into fluorides effects on cognitive development http://www.hsph.harvard.edu/news/features/fluoride-childrens-health-grandjean-choi/ And the actual study http://ehp.niehs.nih.gov/1104912/ There's more out there but this is a good start.