Fluoride chemicals used for water fluoridation schemes
Are you "fluoride deficient"? According to various health organizations and data on diseases this is impossible. As to date there is no known biological process that requires the fluoride ion to function healthily even in trace amounts. The only known use of fluorine in any organism is as a defensive mechanism for one bacterium to kill another.

"Fluoride is not essential for human growth and development.”
SOURCE: European Commission. (2011). Critical review of any new evidence on the hazard profile, health effects, and human exposure to fluoride and the fluoridating agents of drinking water. Scientific Committee on Health and Environmental Risks (SCHER).
“Fluoride is not in any natural human metabolic pathway.”
SOURCE: Cheng KK, et al. (2007). Adding fluoride to water supplies. British Medical Journal 335:699-702.
“[F]luoride is no longer considered an essential factor for human growth and development.”
SOURCE: National Research Council (1993). Health Effects of Ingested Fluoride. National Academy Press, Washington DC. p. 30.
"In summary, FDA does not list fluorine as an essential nutrient.”
[See http://www.fluoridealert.org/wp-content/uploads/fda-1990.pdf]