DrWill

There is no valid, peer-reviewed scientific evidence of any advere effect on IQ from optimally fluoridated water.  The Harvard meta-analysis was of 27 Chinese studies of the effects of high levels of fluoride in the well-water of various Chinese, Mongolian, and Iranian villages.  Not only were the fluoride levels not applicable to fluoridated water in the US, by the admission of the Harvard reviewers themselves, these studies had key information missing, questionable methodologies, and inadequate controls for confounders.  They were so seriously flawed that the Harvard reviewers, Choi and Grandjran, issued a public statement in 2013 stating that no conclusions could be drawn about fluoridated water in the US, from these studies.

Broadbent, et al. concluded in 2014:

"These findings do not support the assertion that fluoride in the context of CWF programs is neurotoxic"

Steven D. Slott, DDS