The authors reviewed scientific evidence to inform Ireland Department of Health with regard to any impact, positive and or negative, on the general health of those exposed to community water fluoridation at the levels of 0.4-1.5 ppm. Based on the existing literature available before 2015, this report concluded that the effects of fluoride in drinking water on osteosarcoma incidence are mixed and no link has been proven. The authors recommended a good quality longitudinal research to affirm or rule out these suggested links.
Health effects of water fluoridation: An evidence review 2015
Sutton M, Kiersey R, Farragher L, Long J.