View source for Water fluoridation controversy

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{{Cleanup|date=October 2007}}

'''Water fluoridation controversy''' refers to debate surrounding the [[water fluoridation|addition of fluoride]] to public water supplies. [[Fluoride|Calcium fluoride]] (CaF2) occurs naturally in the ground water in certain areas of the world. When water is artificially fluoridated, [[sodium fluoride]] (NaF), sodium silicofluoride (SFS) or fluosilicic acid (FSA) is added to raise the fluoride level to a range between .7 and 1.2 parts per million (ppm).

Despite the current stance of the medical and dental research associations, opponents charge that releasing fluoride compounds into municipal water supplies infringes on individual choice as to what a person ingests. They say [[water fluoridation]] is a scheme to dispose of industrial waste and this amounts to a mass dissemination of toxic substances.

Advocates of water fluoridation say that fluoridation is similar to [[iodised salt|fortifying salt with iodine]], [[milk]] with [[vitamin D]] and [[orange juice]] with [[vitamin C]] and say it is an effective way to prevent [[dental caries|tooth decay]] and improve oral health over a lifetime, for both [[child]]ren and [[adult]]s. Opponents counter that there is no U.S. RDA (recommended dietary allowance) for fluoride <ref>http://fnic.nal.usda.gov/nal_display/index.php?info_center=4&tax_level=3&tax_subject=274&topic_id=1323&level3_id=5147</ref> and claim industrial fluorosilicates are serious [[neurotoxic]] and [[mutagenic]] health hazards, even at the [[part per million|1 part per million]] level deemed "optimal" by pro-fluoridation groups. The [[EPA]] Headquarters Union of Scientists say recent, peer-reviewed studies that document [[bone fractures]], [[pediatric]] [[bone cancer|osteosarcoma]], [[genetic mutations]], lowered [[IQ]], decreased [[kidney]], [[thyroid]] and [[pineal gland]] functions, [[arthritis]], [[osteoporosis]] and [[dental fluorosis]] requires an immediate halt to using the nation's drinking water reservoirs as [[toxic waste]] disposal sites.[http://www.fluoridation.com/epa2.htm] <ref>Why EPA Headquarters Union of Scientists Opposes Fluorodation http://www.fluoridation.com/epa2.htm</ref>

==Sodium fluoride and fluorosilicic acid==

Webster's dictionary defines sodium fluoride as:

'''sodium+fluoride'''
Function: ''noun''
:a poisonous crystalline salt NaF that is used in trace amounts in the fluoridation of drinking water, toothpastes, and oral rinses and in metallurgy, as a flux, as an antiseptic, and as a pesticide.<ref>http://medical.merriam-webster.com/medical/sodium+fluoride</ref>

[[Sodium fluoride]] is also one of the main ingredients in [[fungicides]], rat and possum poison ([[sodium fluoroacetate]], also known as "1080")<ref>http://www.doc.govt.nz/upload/documents/science-and-technical/sfc001.pdf</ref> and [[Sarin|Sarin nerve gas]] (isopropyl-methyl-phosphoryl-fluoride).<ref>http://www.uvkchem.com/contentswar.pdf</ref>

The Material Data Safety Sheet (MSDS) for sodium fluoride (NaF) warns:

Section 3: Hazards Identification:
DEVELOPMENTAL TOXICITY: The substance may be toxic to kidneys, lungs, the nervous system, heart, gastrointestinal tract, cardiovascular system, bones, teeth. Repeated or prolonged exposure to the substance can produce target organs damage. Repeated exposure to a highly toxic material may produce general deterioration of health by an accumulation in one or many human organs.<ref>http://www.sciencelab.com/xMSDS-Sodium_fluoride-9927595</ref>

Over 90% of the fluoride compounds added to water are [[fluorosilicic acid]] (FSA) or sodium fluorosilicate (SFS), which are industrial byproducts of fluorine gas concentrates that are captured in pollution scrubbers during the manufacture of phosphate fertilizer. The [[phosphate rock|phosphate ores]] used to make fertilizer are a natural source of [[radiation]]. During the manufacturing process, trace amounts of heavy metals, including [[lead]], [[arsenic]], [[mercury (element)|mercury]] and radioactive nuclides such as [[uranium]] and [[radium]] are captured in the pollution scrubber and carried into the fluorosilicic acid concentrate.<ref>H.F. Denzinger, H.J. Konig and G.E. Kruger in the fertilizer industry journal "Phosphorus and Potassium" (No. 103 Sept./Oct. 1979)</ref> The [[radionuclide]]s [[radon|radon-222]] and [[polonium|polonium-210]] readily combine with [[fluorine]], which is the most reactive element. As little as 0.03 microcuries (6.8 trillionths of a gram) of [[polonium-210]] can be carcinogenic to humans.<ref>George C. Glasser, "Earth Island Journal"</ref> In addition, [[lead]] is absorbed like [[calcium]] in the body, where it can be stored in the bones for years before decaying and triggering a release of [[alpha radiation]]. Unless tests for specific [[isotopes]] are performed, no one would know that a transmutation had occurred from [[lead|lead-214]] to [[bismuth|bismuth-214]] and then to the highly radioactive [[polonium|polonium-214]]. Despite pro-fluoridation group's claims that fluorosilicic acid is comparable to a "vitamin" or "nutrient", the manufacturer's data sheet describes FSA as a DOT Class 6.1 Poisonous/Toxic substance, subject to [[hazardous materials|hazmat]] regulations, with a maximum content of .020% [[heavy metals]] (as lead, or 1 part in 5000). In contrast, the [[EPA]] has a zero-level goal for [[lead]] in drinking water, with a new MCL (maximum contaminant level) of five parts per billion.

==EPA employee and citizen opposition==

In 2005, eleven [[EPA]] employee unions representing over 7000 environmental and public health professionals of the Civil Service called for a moratorium on drinking water fluoridation programs across the country and asked EPA management to recognize fluoride as posing a serious risk of causing [[cancer]] in people. The unions acted following revelations of an apparent cover-up of evidence from [[Harvard]] School of Dental Medicine linking fluoridation with an elevated risk of [[osteosarcoma]] in boys, a rare but fatal bone cancer.<ref>The Washington Post: "Professor at Harvard Is Being Investigated" http://www.washingtonpost.com/wp-dyn/content/article/2005/07/12/AR2005071201277.html</ref> [http://nteu280.org/Issues/Fluoride/fluoridesummary.htm]

In addition, over 1000 health industry professionals, including doctors, dentists, scientists and researchers from a variety of disciplines are calling for an end to water fluoridation in an online petition to Congress. [http://www.fluoridealert.org/statement.august.2007.html]

Their petition highlights eight recent events that they say mandates a moratorium on water fluoridation, including a 500-page review of fluoride’s toxicology that was published in 2006 by a distinguished panel appointed by the [[National Research Council]] of the [[National Academies]]. [http://www.nap.edu/catalog.php?record_id=11571] While the NRC report did not specifically examine artificially fluoridated water, it concluded that the [[US]] [[Environmental Protection Agency|Environmental Protection Agency's]] safe drinking water standard of 4 parts per million (ppm) for fluoride is unsafe and should be lowered. Despite over 60 years of fluoridation without a single double-blind study of fluoride's effectiveness and many basic research questions that have never been addressed, the panel reviewed a large body of literature in which fluoride has a statistically significant association with a wide range of adverse effects.<ref>http://www.nap.edu/catalog.php?record_id=11571</ref>

Several prominent dental researchers and government advisors who were leaders of the pro-fluoridation movement have announced reversals of their former positions after they concluded that water fluoridation is not an effective means of reducing dental caries and that it poses serious risks to human health. The late Dr. John Colquhoun was Principal Dental Officer of [[Auckland]], [[New Zealand]]. In an article titled, ''"Why I changed my mind about water fluoridation''", he published his reasons for changing sides. [http://www.fluoride-journal.com/98-31-2/312103.htm] <ref>http://www.fluoride-journal.com/98-31-2/312103.htm ''Why I changed my mind about water fluoridation.'' Colquhoun, J. Perspectives in Biology and Medicine 41 1-16 (1997)</ref> 

Dr. Hardy Limeback, BSc, PhD, DDS was one of the 12 scientists who served on the [[National Academy of Sciences]] panel that issued the aforementioned report, ''Fluoride in Drinking Water: A Scientific Review of the EPA's Standards.'' Dr. Limeback is an associate professor of dentistry and head of the preventive dentistry program at the [[University of Toronto]].<ref>http://www.fluoridealert.org/limeback.htmLetter. Limeback, H. April 2000. Faculty of Dentistry, University of Toronto</ref> He detailed his concerns in an April 2000 letter titled, ''"Why I am now officially opposed to adding fluoride to drinking water"''. [http://www.fluoridealert.org/limeback.htm]

In a presentation to the [[California]] Assembly Committee of Environmental Safety and Toxic Materials, Dr. Richard Foulkes, B.A., M.D., former special consultant to the Minister of Health of [[British Columbia]], revealed:

''"The [water fluoridation] studies that were presented to me were selected and showed only positive results. Studies that were in existence at that time that did not fit the concept that they were "selling," were either omitted or declared to be "bad science." The endorsements had been won by coercion and the self-interest of professional elites. Some of the basic "facts" presented to me were, I found out later, of dubious validity. We are brought up to respect these persons in whom we have placed our trust to safeguard the public interest. It is difficult for each of us to accept that these may be misplaced."'' [http://www.sonic.net/kryptox/politics/lead20s.htm]

Despite various concerns by private citizens, government agencies such as the [[CDC]] and [[WHO]] continue to support water fluoridation as being a safe and effective means of reducing dental decay.

== Role in oral health ==

There are some groups which consider fluoride neither a [[vitamin]] nor an [[essential nutrient]] and claim that is the same belief held by the medical community.<ref>[http://www.bruha.com/pfpc/html/essential_.html Is Fluoride A Nutrient?],[http://www.bruha.com/pfpc/index.html PFPC The Fluoride Education Project] webpage, page accessed 23 February, 2006.</ref>  Fluoridation opponents believe that excellent dental health can be maintained through alternative methods, such as modifying [[diet (nutrition)|diet]] by consuming less sugar, chewing [[xylitol#Dental care|xylitol]] gum as is done in [[Europe]], and good dental hygiene through flossing and brushing the teeth - even with fluoride toothpaste. They argue that since the effects of fluoride is primarily topical, there is no need to actually consume fluoride.  Furthermore, the benefits of fluoridated water do not outweigh the costs of systemic harm on the body. Consequently, they argue that there is no need to fluoridate the community drinking water.

Despite these claims, dental research has shown that fluoride has a positive effect on dental health.  During [[tooth development]], fluoride binds to the [[hydroxyapatite]] crystals present in [[tooth enamel|enamel]] and makes the enamel more resistant to demineralization by [[acid]]s.<ref>Ross, Michael H., Gordon I. Kaye, and Wojciech Pawlina, ''Histology: a Text and Atlas'', 4th ed. (Baltimore: Lippincott Williams & Wilkins, 2002), p. 453. ISBN 0-683-30242-6.</ref>  As a result, some organizations, such as the American Dental Hygiene Association, classify fluoride as a [[nutrient]] necessary for proper tooth development.<ref>[http://www.adha.org/CE_courses/course7/nutritional_factors.htm Nutritional Factors in Tooth Development and Maintenance], [http://www.adha.org American Dental Hygiene Association] website, page accessed 4 March, 2006.</ref>  In addition, organizations, including the CDC and WHO, promote increasing the accessibility of fluoridated water.<ref>[http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5107a2.htm "Populations Receiving Optimally Fluoridated Public Drinking Water"], from the [http://www.cdc.gov CDC] website, page accessed 4 March, 2006.</ref><ref name="whostatement">[http://www.who.int/water_sanitation_health/oralhealth/en/index2.html World Health Organization] website, "World Water Day 2001: Oral health", page 3, page accessed March 3, 2006.</ref>

== Use throughout the world ==

Water Fluoridation is prevalent in the [[United States]].  Most [[developed nation]]s previously fluoridated their water, but stopped or banned the practice.<ref>[http://www.kirj.ee/esi-l-k/k50-2-2.pdf]</ref>   Some examples are as follows.  The years when water Fluoridation started and stopped are in parentheses:
* German Federal Republic (1952-71)
* Sweden (1952-71)
* Netherlands (1953-76)
* Czechoslovakia (1955-1990)
* German Democratic Republic (1959-90)
* Soviet Union (1960-90)
* Finland (1959-93)
* Japan (1952-72)

In spite of this, the prevalence of [[dental caries|dental decay]] has decreased in both Western Europe and the United States.<ref>[http://www.fluoridealert.org/health/teeth/caries/who-dmft.html Health Effects: Tooth Decay Trends in Fluoridated vs. Unfluoridated Countries],[http://www.fluoridealert.org Fluoride Alert] webpage, page accessed 22 February, 2006.</ref>  Some countries had water fluoridation but then abruptly stopped the practice. These countries, including the former [[East Germany]], [[Cuba]], and [[Finland]], have continued to see drops in the incidence of tooth decay.<ref>[http://www.fluoridealert.org/feb-2001.htm Cavities Not Increasing, But Decreasing, When Fluoridation Stops],[http://www.fluoridealert.org Fluoride Alert] webpage, page accessed 22 February, 2006.</ref> Based on this evidence, opponents conclude that water fluoridation is unnecessary.

Though water fluoridation is promoted by many health organizations and is considered the least [[cost]]ly method of dispersing fluoride, other methods of dispersal are possible. In areas with complex water sources, water fluoridation is more difficult and more costly. Thus, other methods to fluoride are supported in those cases. The [[World Health Organization]] is currently assessing the effects of affordable fluoridated toothpaste, milk fluoridation and salt fluoridation in [[Africa]], [[Asia]], and [[Europe]].<ref>[http://www.who.int/entity/oral_health/media/en/orh_report03_en.pdf WHO World Oral Health Report] (in pdf format), from the [http://www.who.int World Health Organization] website, accessed on 4 March, 2006.</ref>

Moreover, a major concern of health organizations is the incidence of [[dental fluorosis]], a sign of overexposure to fluoride. In many instances, natural fluoride levels in water are much higher than desired. These areas do not need fluoride added to water supplies, and health organizations endorse providing alternate water sources or adjusting the fluoride levels to deliver the proper amount for dental health instead.<ref>[http://www.who.int/water_sanitation_health/oralhealth/en/index3.html "World Water Day 2001: Oral health"], [http://www.who.int World Health Organization] website, page 4, page accessed March 4, 2006.</ref>

== Effectiveness ==

Frequently, opponents point to a study by the National Institute of Dental Research showing little difference in tooth decay rates among children in fluoridated and non-fluoridated communities.  In the study's results, the difference between the children exposed to water fluoridation, and those who were not exposed, was very small, between 0.12 and 0.30 DMFS (Decayed Missing and Filled Surfaces).<ref>[http://www.nofluoride.com/Fuzzy_Math.htm The "Fuzzy Math" of Fluoride Promotion], [http://www.nofluoride.com No Fluoride] website, Paul Connett, accessed 18 February, 2006.</ref>

[[Image:FluorideTrays07-05-05.jpg|right|250px|thumb|Some detractors of water fluoridation support concentrated topical methods to deliver fluoride, as seen in these fluoride trays often used in dentistry.]]

Opponents also argue that in the instances that fluoride prevents tooth decay, the effects are merely topical.<ref>[http://www.fluoridealert.org/health/teeth/caries/index.html Health Effects: Fluoride & Tooth Decay (Caries)], [http://www.fluoridealert.org Fluoride Alert] website, accessed 18 February, 2006.</ref>  Therefore, fluoridating water is unnecessary and ineffective.  Instead, they argue, [[Fluoride therapy|direct applications]] of fluoride to teeth as done in dental offices and with fluoridated [[toothpaste]]s should be the recommended methods.

Opponents point out that dental decay continues to exist in water fluoridated communities.  They reason that if fluoride is effective, then there would be no more tooth decay.  While, in theory, the poorest members of society would be aided the most by fluoridinated water, [[baby bottle tooth decay]] (BBTD) and tooth decay in general is still prevalent in those social groups.  Opponents conclude that, in light of the continuing dental health problem, water fluoridation is unable to successfully increase health standards and thus should not be used.<ref>[http://www.fluoridealert.org/fluoride-facts.htm Facts about Fluoridation], [http://www.fluoridealert.org Fluoride Alert] website, accessed 22 February, 2006.</ref>

Finally, opponents argue that the general decline of tooth decay is the result of factors beside water fluoridation, including toothpaste with fluoride, improved diets, and overall improved general and dental health.<ref>[http://www.slweb.org/limeback.html Why I am now officially opposed to adding fluoride to drinking water], [http://www.slweb.org Second Look] website, Hardy Limeback, accessed 22 February, 2006.</ref>

[[Image:Suspectedmethmouth09-19-05closeup.jpg|left|200px|thumb|An example of rampant decay.]]

The Centers for Disease Control and Prevention published in its Morbidity and Mortality Weekly Report (MMWR) that starting or continuing water fluoridation decreased the [[Incidence (epidemiology)|incidence]] of [[dental caries|tooth decay]] by 29%, and that stopping water fluoridation increased the incidence of tooth decay in some communities.<ref>[http://www.cdc.gov/mmwr/PDF/rr/rr5021.pdf Promoting Oral Health: Interventions for Preventing Dental Caries, Oral and Pharyngeal Cancers, and Sports-Related Craniofacial Injuries: A Report on Recommendations of the Task Force on Community Preventive Services] (in pdf format), from the Morbidity and Mortality Weekly Report (MMWR) produced by the CDC, page accessed 4 March, 2006.</ref>  Other organizations also see a clear link between desired fluoride levels in water and a decrease in tooth decay.

In addition, since oral health is affected by many factors, fluoride alone would be unable, nor would it be expected, to eradicate the [[disease]].  The [[Group (sociology)|social group]]s that would be more likely to benefit from water fluoridation are those living in poorer conditions, and an important factor to decrease dental [[health disparities]] may be water fluoridation programs.<ref name="whostatement">[http://www.who.int/water_sanitation_health/oralhealth/en/index2.html World Health Organization] website, "World Water Day 2001: Oral health", page 3, page accessed March 3, 2006.</ref>  Nonetheless, it is understood that these communities suffer from various problems which would impede oral health, such as lack of access to dental care and poorer [[oral hygiene]] [[education]].  Water fluoridation is only a single factor to improve dental health.

== Safety ==

There are some opponents of fluoridation who believe fluoride is a poison that can lead to death or, more commonly, dental fluorosis in instances of overdose.  They argue that having a lethal chemical in the water is reckless and leads to many health problems in the general public.

[[Image:Fluorosis-severe.jpg|right|200px|thumb|Teeth as seen in dental fluorosis caused by excessive fluoride.]]

These persons point to research which they say supports the notion that fluoride causes chromosomal damage and interferes with DNA repair.<ref>[http://www.fluoridealert.org/health/cancer/mutagen.html Health Effects: Fluoride's Mutagenicity (Genotoxicity)], [http://www.fluoridealert.org Fluoride Alert] website, accessed 18 February, 2006.</ref>  They point to animal studies that they say demonstrate that rats fed for one year with 1 ppm fluoride in their water had detrimental changes to their kidneys and brains,<ref>[http://www.fluoridealert.org/health/kidney/index.html#animals1ppm Health Effects: Fluoride & the Kidneys], [http://www.fluoridealert.org Fluoride Alert] website, accessed 18 February, 2006.</ref> an increased uptake of aluminum in the brain, and the formation of [[Amyloid beta|beta amyloid]] deposits, a characteristic of Alzheimers disease.<ref>[http://www.fluoridealert.org/health/brain/index.html Health Effects: Fluoride & the Brain] [http://www.fluoridealert.org Fluoride Alert] website, accessed 18 February, 2006.</ref>  In animal studies, fluoride has been shown to inhibit melatonin production and promote precocious puberty.  <ref>[http://fluoridealert.org/health/pineal/luke-1997.html]</ref>  Fluoride may have an analogous inhibitory effect on human melatonin production, as fluoride accumulates readily in the human pineal gland, the brain organ responsible for melatonin synthesis. <ref>[http://www.icnr.com/jluke/fluoridedeposition.html]</ref>  Further, it is argued by some opponents that fluoride can weaken the immune system, leaving people vulnerable to the development of cancer and AIDS.<ref>[http://www.fluoridedebate.com/question25.html Diseases: Question 25], [http://www.fluoridedebate.com Fluoride Debate] website, accessed 19 February, 2006.</ref>

Theses groups further emphasize that an overdose of fluoride is associated with [[liver]] damage, [[kidney]] function, and [[fluorosis]] in children.<ref>[http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&dopt=AbstractPlus&list_uids=16834990&query_hl=3&itool=pubmed_docsum PubMed NCBI Dose-effect relationship between drinking water fluoride levels and damage to liver and kidney functions in children.]</ref>  At high doses, fluoride has many side effects.  Animal studies demonstrate that fluoride can damage the male reproductive system in various species.<ref>[http://www.fluoridation.com/sperm.htm The reproductive effects of fluoride intake], [http://www.fluoridation.com Fluoridation.com] website, accessed 18 February, 2006.</ref>  Consequently, fluoride is considered dangerous by these groups.

Advocates of water fluoridation agree that fluoride in high concentrations produces harmful effects to the [[body]].  Nonetheless, they argue that almost any substance is harmful because [[toxicity]] is based on the amount of exposure.<ref>[http://www.ada.org.au/_FAQFl.asp#Is%20fluoride%20poisonous Is fluoride poisonous?], from the [http://www.ada.org.au/_Home.asp Austrialian Dental Association] website, page accessed 18 March, 2006.</ref>  In defending water fluoridation, the American Dental Association points out that [[vitamin A]], [[vitamin D]], [[iron]], [[iodine]], [[aspirin]], and [[water]] are potentially harmful if given in certain amounts.<ref name="adafluoridationfacts">[http://www.ada.org/public/topics/fluoride/facts/fluoridation_facts.pdf Fluoridation Facts] (in pdf format), from the [http://www.ada.org ADA] website, page accessed 18 March, 2006.</ref>  As is true for all [[vitamin]]s and [[mineral]]s, recommended dosages for fluoride represent levels which maximize health benefits and minimize adverse effects.<ref>[http://www.scotland.gov.uk/consultations/health/ccoh-06.asp Towards Better Oral Health in Children], from the [http://www.scotland.gov.uk/Home Scottish Executive] website, page accessed 18 March, 2006.</ref>

The greatest concern with fluoride overexposure is [[dental fluorosis]].  Fluorosis is undesirable because, in severe cases, it discolors teeth, causes surface changes to the [[tooth enamel|enamel]], and makes [[oral hygiene]] more difficult.<ref>[http://www.aapd.org/publications/brochures/fluorosis.asp Enamel Fluorosis], from the [http://www.aapd.org American Academy of Pediatric Dentistry] website, page accessed 18 March, 2006.</ref>  Government agencies, such as the Center for Disease Control and Prevention, keep records on the [[prevalence]] of fluorosis in the general public.<ref>[http://www.cdc.gov/mmwr/preview/mmwrhtml/ss5403a1.htm#tab23 Surveillance for Dental Caries, Dental Sealants, Tooth Retention, Edentulism, and Enamel Fluorosis --- United States, 1988--1994 and 1999--2002], from the [http://www.cdc.gov CDC] website, page accessed 18 March, 2006.</ref>  Also a concern, [[skeletal fluorosis]] is a disease in which fluoride deposits into [[bone]], causing [[joint]] stiffness, joint pain, and sometimes changes in bone shape.<ref>[https://www.who.int/water_sanitation_health/diseases/fluorosis/en/ Water-related diseases: Fluorosis], from the [https://www.who.int/en/ World Health Organization] website, page accessed 18 March, 2006.</ref>  For skeletal fluorosis to occur, chronic, high level exposure to fluoride is required.  A mild form of skeletal fluorosis, [[osteosclerosis]], is seen when levels of fluoride reach 5 parts per million (ppm) and the time of exposure lasts for 10 years.<ref name="adafluoridationfacts">[http://www.ada.org/public/topics/fluoride/facts/fluoridation_facts.pdf Fluoridation Facts] (in pdf format), from the [http://www.ada.org ADA] website, page accessed 18 March, 2006.</ref>

{| cellpadding=10 align=left
|-
|
{| border="BORDER" style="border-collapse:collapse;padding:3px;text-align:center;"
! colspan=4 style="background:#ffdead;padding:3px" | Schedule for Fluoride Prescription<ref name="aapdschedule">[http://www.aapd.org/media/Policies_Guidelines/G_FluorideTherapy.pdf Fluoride Therapy] (in pdf format), from the [http://www.aapd.org American Association of Pediatric Dentistry] website, page accessed 18 March, 2006.</ref>
|-
! style="width:10em" | Age
! style="width:5em" colspan=1 | < 0.3 ppm
! style="width:5em" colspan=1 | 0.3 - 0.6 ppm
! style="width:5em" colspan=1 | >0.6 ppm
|-
| Birth - 6 months
| 0
| 0
| 0
|-
| 6 months - 3 years
| .25 mg
| 0
| 0
|-
| 3 years - 6 years
| .50 mg
| .25 mg
| 0
|-
| 6 years - 16 years
| 1.0 mg
| .50 mg
| 0
|}
Dosages are in milligrams F/day; 1.0 ppm = 1 mg/liter.
|}

In order to best prevent fluorosis, health organizations have created guidelines restricting the amount of fluoride exposure.  The [[United States Environmental Protection Agency]] limits the maximum amount of fluoride in drinking water to 4.0 milligrams per liter of water and recommends water supplies to contain between 0.7 and 1.2 [[Kilogram|milligram]]s of fluoride per [[Litre|liter]].<ref>[http://www.atsdr.cdc.gov/tfacts11.html ToxFAQs for Fluorine, Hydrogen Fluoride, and Fluorides], from the [http://www.atsdr.cdc.gov/ Agency for Toxic Substances and Disease Registry] (ATSDR) website, page accessed 18 March, 2006.</ref>  The [[World Health Organization]] cautions that fluoride levels above 1.5 milligrams per liter leaves the risk for fluorosis.<ref>[http://www.who.int/water_sanitation_health/naturalhazards/en/index2.html Fluoride], from the [http://www.who.int/en/ Agency for World Health Organization] website, page accessed 18 March, 2006.</ref>  When fluoride levels in water are low (usually below 0.6 ppm), fluoride [[Dietary supplement|supplement]]s are sometimes prescribed to encourage healthy dental development.  There are accepted recommended guidelines on the amount of fluoride to [[Medical prescription|prescribe]], which depend on the fluoride levels in the drinking water and on the age of the child.<ref name="aapdschedule">[http://www.aapd.org/media/Policies_Guidelines/G_FluorideTherapy.pdf Fluoride Therapy] (in pdf format), from the [http://www.aapd.org American Association of Pediatric Dentistry] website, page accessed 18 March, 2006.</ref>

Moreover, health organizations have affirmed the currently accepted belief that recommended levels of fluoride does not contribute to the many [[disease]]s water fluoridation detractors accuse fluoride of causing.  The Centers for Disease Control and Prevention and the [[National Cancer Institute]] have both issued statements that water fluoridation is not believed to cause [[osteosarcoma]]s.<ref>[http://www.cdc.gov/oralhealth/waterfluoridation/safety/osteosarcoma.htm CDC Statement on Water Fluoridation and Osteosarcoma], from the [http://www.cdc.gov CDC] website, page accessed 18 March, 2006.</ref><ref name="nciosteosarcomas">[http://www.cancer.gov/cancertopics/factsheet/Risk/fluoridated-water National Cancer Institute] website, "Fluoridated Water: Questions and Answers", page accessed March 3, 2006.</ref>  [[Cancer]] in general is not believed to be caused from water fluoridation.<ref>Knox, E.G. [http://www.bopcris.ac.uk/bopall/ref20842.html "Fluoridation of water and cancer: a review of the epidemiological evidence"], hosted on the [http://www.bopcris.ac.uk/ British Official Publications Collaborative Reader Information Service] website, page accessed 18 March, 2006.  Full text can be found [http://www.bopcris.ac.uk/imgall/ref20842_1_1.html here]</ref><ref>[http://www-cie.iarc.fr/htdocs/monographs/vol27/fluorides.html "Inorganic Fluorides Used In Drinking-water and Dental Preparations"], by the [http://www.iarc.fr International Agency on Research for Cancer] website, page accessed 18 March, 2006.</ref>  

There is no clear link between [[Alzheimer's disease]] and water fluoridation.<ref name="adafluoridationfacts">[http://www.ada.org/public/topics/fluoride/facts/fluoridation_facts.pdf Fluoridation Facts] (in pdf format), from the [http://www.ada.org ADA] website, page accessed 18 March, 2006.</ref>  A study in 1998 suggested a possible relationship between fluoride exposure and Alzheimer's disease.<ref>Varner, J.A., K.F. Jensen, W. Horvath, R.L. Isaacson.  [http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9518651&dopt=Citation "Chronic administration of aluminum-fluoride or sodium-fluoride to rats in drinking water: alterations in neuronal and cerebrovascular integrity"], abstract from [http://www.pubmed.gov PubMed] website, page accessed 18 March, 2006.</ref>  Research groups point out that the study contained methodological limitations, which prevent a definitive conclusion on the subject. As a result, research and health agencies currently believe fluoride is not a risk factor for Alzheimer's disease, and instead [[Ageing|age]] and [[Family history (medicine)|family history]] are the most important risk factors.<ref>[http://www.nia.nih.gov/Alzheimers/AlzheimersInformation/Causes/ Causes"], by the [http://www.nia.nih.gov/alzheimers Alzheimer's Disease Education and Referral (ADEAR) Center] website, a division of the National Institute of Aging, page accessed 18 March, 2006.</ref>  Moreover, there is some research that suggests Alzheimer's disease can be prevented with water fluoridation because of the competition between [[aluminum]] and fluoride [[Digestion|absorption]].<ref>Kraus, A.S. and W.F. Forbes.  [http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1617567&dopt=Citation "Aluminum, fluoride and the prevention of Alzheimer's disease."], abstract from [http://www.pubmed.gov PubMed] website, page accessed 18 March, 2006.</ref>  Nonetheless, this research is also limited by design and no definitive conclusion of this effect can be made.

Other health concerns, such as [[kidney]] disease, [[Down syndrome]], [[lead poisoning]], [[heart disease]], decreased [[fertility]] rates, and inhibition of biologic [[enzyme]]s, are not believed to be attributed to water fluoridation.<ref name="adafluoridationfacts">[http://www.ada.org/public/topics/fluoride/facts/fluoridation_facts.pdf Fluoridation Facts] (in pdf format), from the [http://www.ada.org ADA] website, page accessed 18 March, 2006.</ref>

== Reliance on experts ==
{{NPOV}} {{weasel}} {{Refimprove|date=August 2007}}
Many fluoridation opponents rely on experts opposing water fluoridation to validate their argument of the dangers of fluoride.  People, such as scientists and Nobel prize winners, are exemplified as a large knowledgeable group that have stated their opposition against water fluoridation.<ref>[http://nteu280.org/Issues/Fluoride/NTEU280-Fluoride.htm Why EPA headquarters Union of Scientists Opposes Fluoridation], hosted on the National Treasury Employees Union. Page accessed January 21, 2007.</ref><ref>[http://www.slweb.org/carlsson.html Nobel laureate opposes fluoride],hosted on the Second Look website. Page accessed January 21, 2007.</ref>

In response, scientific and health organizations criticize opponents of water fluoridation for trying to engage in "polling practices" with research.  When a group opposing water fluoridation claims an award-winning researcher or dental [[expert]] agrees with them, the argument is supposed to be more convincing to the general public.  Researchers emphasize that voting or polling is not how scientific progress is made.<ref name="uwfdeception">[http://www.uwf.edu/rsnyder/reports/fluoride.html "Impact of Fluoridation of the Municipal Drinking Water Supply: Review of the Literature"], hosted on the [http://www.uwf.edu/uwfMain/ University of West Florida] website, page accessed 4 March, 2006.</ref>  Thorough review of methodology and design of multiple studies over time lead researchers to conclusions.  Even in the critical analysis of these studies, content is the focus, rather than the researcher who led the study.

Another criticism of water fluoridation opponents given is their reference to research seeming to support their view.  Generally, those studies are criticized by the majority of scientific researchers on basic principles, such as the methodology used.  More problematic is the accusation that some anti-fluoridation research is published in [[journal]]s, such as "Fluoride", that are deceptively made to appear [[Peer review|peer-reviewed]].<ref name="uwfdeception">[http://www.uwf.edu/rsnyder/reports/fluoride.html "Impact of Fluoridation of the Municipal Drinking Water Supply: Review of the Literature"], hosted on the [http://www.uwf.edu/uwfMain/ University of West Florida] website, page accessed 4 March, 2006.</ref>

== Ethics ==

One aspect of opposition to water fluoridation regards the social or political implications of adding fluoride to public water supplies.  Setting aside the claim that water fluoridation may improve dental health, such an act would violate an individual's choice to pursue free choice of, or form of, medical treatment and it is argued that water fluoridation is "compulsory mass medication" because it does not allow proper consent.<ref>[http://www.fluoridedebate.com/question34.html The Fluoride Debate: Question 34], [http://www.fluoridedebate.com Fluoride Debate] website, accessed 23 February, 2006.</ref>

It is also argued that, because of the negative health effects of fluoride exposure, mandatory fluoridation of public water supplies is a "breach of ethics" and a "human rights violation."<ref>[http://www.iicph.org/docs/fluoride_primer.htm Fluoride Primer: Fluoridation is a serious breach of ethics], [http://www.iicph.org International Institute of Concern for Public Health] website, accessed 22 February, 2006.</ref>  Litigation, both pro and con, has been a frequent outcome of forced water fluoridation.

Many advocates of fluoridation do not consider it a violation of people's right to consent to medical treatment.  They usually argue that fluoridation is not a form of mass medication because fluoride is naturally present in all water systems.<ref name="adafluoridationfacts">[http://www.ada.org/public/topics/fluoride/facts/fluoridation_facts.pdf Fluoridation Facts] (in pdf format), from the [http://www.ada.org ADA] website, page accessed 18 March, 2006.</ref>  Opponents argue that the form of fluoride found in naturally fluoridated water supplies is not the same as the form used to artificially fluoridate water.  Likewise, opponents argue that the pharmacy grade fluoride used in many studies to support fluoride as a tooth decay preventative is not the grade used to fluoridate water. Frequently, those who promote water fluoridation make the comparison to the fortification of other types of foods, such as adding vitamins to [[breakfast cereal]]s and [[baby food]]s.<ref name="bmastatment">[http://www.bma.org.uk/ap.nsf/Content/Water+fluoridation British Medical Association] website, statement on water fluoridation, page accessed March 3, 2006.</ref>  

In addition, proponents propose that preventing broad, easy access to fluoride is unethical.  Since the populations which benefit most from water fluoridation are children and those in poorer communities, fluoridation is considered an avenue to relieve some of the health disparities between [[Socioeconomics|socio-economic]] groups.<ref>[http://www.bfsweb.org/One%20in%20a%20million/10%20ethics.pdf "The Ethics of Water Fluoridation"] publication (in pdf format), from the [http://www.bfsweb.org/index.html British Fluoridation Society] website, page accessed March 19, 2006.</ref>  Fluoridation is defended further by its relative low cost.  The Canadian Task Force On Preventive Health Care describes water fluoridation as "the single most effective, equitable and efficient means of preventing coronal and root dental caries."<ref>Lewis DW and Ismail AI. Prevention of dental caries. In: Canadian Task Force on the Periodic Health Examination. [http://www.ctfphc.org/Full_Text/Ch36full.htm Canadian Guide to Clinical Preventive Health Care]. Ottawa: Health Canada, 1994; 408-17. Page accessed August 13, 2006.</ref>  In the United States, the cost can be as low as 31 cents per person, per year.<ref name="RingelbergCost">Ringelberg, M. L., S. J. Allen, L. J. Brown. [http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1564695&dopt=Citation "Cost of fluoridation: 44 Florida communities."], abstract from [http://www.pubmed.gov PubMed] website, page accessed 19 March, 2006.</ref>  As a result, many health organizations defend fluoridation and do not consider it a violation of ethical principles.

== Government and industry conspiracy ==

Some opponents point to a government conspiracy that has modified scientific research to further its own political goal. The particular conspiracy involves the secret development of the [[nuclear weapon|atomic bomb]] during [[World War II]]. The argument usually involves characterizing research as flawed or edited for the public in order to avoid public concern over military research. As some have put it, "The science of fluoridating public drinking water systems has been, from day one, shoddy at best . . . . the basis of that science was rooted in protecting the U.S. Atomic bomb program from litigation."<ref>[http://www.fluoridation.com/atomicbomb.htm Fluoride, Teeth, And the Atomic Bomb], [http://www.fluoridation.com Flordiation.com] website, Joel Griffiths and Chris Bryson, accessed 18 February, 2006.</ref> 

Other conspiracy theories involve large industrial companies wanting to rid themselves of fluorine "waste products".<ref>[http://www.findarticles.com/p/articles/mi_m1282/is_12_55/ai_103135852 Water Fights: Believe it or not, the fluoridation war still rages — with a twist you may like - efforts to have cities no longer fluoridate water], [http://www.findarticles.com FindArticles.com] website, Jay Nordlinger, accessed 22 February, 2006.</ref> Some argue that fluoride is a waste product that is unusable and expensive to dispose of properly. Because of this expense, industrial companies desiring to protect their profits release "millions of tons of waste fluoride into the environment."<ref>[http://www.fluoridealert.org/f-industry.htm Fluoride: Commie Plot or Capitalist Ploy], [http://www.fluoridealert.org Fluoride Alert] website, Joel Griffiths, accessed 18 February, 2006.</ref> As a result, these opponents of water fluoridation say, "it is now clear that the one utterly relentless force behind fluoridation is American 'big industry' ".<ref>[http://www.fluoridation.com/exner.htm Fluoride: A Protected Pollutant], [http://www.fluoridation.com Flordiation.com] website, Dr. F. B. Exner, accessed 18 February, 2006.</ref> 

In spite of this, a large majority of government agencies and medical organizations support water fluoridation in locations needing fluoride supplementation and agree that it is a safe practice.  ''(See [[Water fluoridation controversy#Medical approval|Medical approval]] for a list of health organizations.)''  The [[Centers for Disease Control and Prevention]] (CDC) has listed water fluoridation as one of the ten greatest achievements in [[public health]] of the [[20th century]].<ref>[http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4841a1.htm CDC], website, "Achievements in Public Health, 1900-1999: Fluoridation of Drinking Water to Prevent Dental Caries," page accessed 4 March, 2006.  Overview of list can be found [http://www.cdc.gov/mmwr/preview/mmwrhtml/00056796.htm here].</ref> In 2000, a report by the [[Surgeon General of the United States]] titled "Oral Health in America" stated, "Community water fluoridation remains one of the great achievements of public health in the twentieth century."<ref>[http://profiles.nlm.nih.gov/NN/ListByDate.html Reports of the Surgeon General], hosted by the National Library of Medicine, page accessed 4 March, 2006.  The document, "Oral Health in America: A Report of the Surgeon General" can be found [http://profiles.nlm.nih.gov/NN/B/B/J/T/_/nnbbjt.pdf here] (in pdf format).</ref>  Various international groups, including the [[World Health Organization]] (WHO) and the International Association for Dental Research (IADR) support water fluoridation as a safe and effective method to fight [[dental caries|tooth decay]].<ref name="whostatement">[http://www.who.int/water_sanitation_health/oralhealth/en/index2.html World Health Organization] website, "World Water Day 2001: Oral health", page 3, page accessed March 3, 2006.</ref><ref name="iadrstatement">[http://www.dentalresearch.org/about/iadr/policy.html International Association for Dental Research] policy statements, including water fluoridation, page accessed March 3, 2006.</ref>

==Court cases==
===United States===

Fluoridation has spawned many court cases. Anti-fluoride activists have sued municipalities, claiming that their rights to consent to medical treatment, [[right to privacy|privacy]], and [[due process]] are infringed by mandatory water fluoridation.<ref>Cross, D. W., R. J. Carton.  [http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12749628&dopt=Abstract "Fluoridation: a violation of medical ethics and human rights."], abstract from [http://www.pubmed.gov PubMed] website, page accessed 19 March, 2006.</ref>  Individuals have sued municipalities for a number of illnesses that they blamed on fluoridation of the city's water supply. A substantial majority of courts have held in favor of cities in such cases, finding no or only a tenuous connection between health problems and widespread water fluoridation.<ref name="beck">Beck v. City Council of Beverly Hills, 30 Cal. App. 3d 112, 115 (Cal. App. 2d Dist. 1973) ("Courts through the United States have uniformly held that fluoridation of water is a reasonable and proper exercise of the police power in the interest of public health. The matter is no longer an open question." (citations omitted)).</ref>  To date, no federal appellate court or state court of last resort (i.e., state supreme court) has found water fluoridation to be unlawful.<ref>Pratt, Edwin, Raymond D. Rawson & Mark Rubin, ''Fluoridation at Fifty: What Have We Learned'', 30 J.L. Med. & Ethics 117, 119 (Fall 2002)</ref>

====Early cases====
A flurry of cases were heard in numerous state courts in the 1950s during the early years of water fluoridation.  State courts consistently held in favor of allowing fluoridation to continue, analogizing fluoridation to mandatory vaccination and the use of other chemicals to clean the public water supply, both of which had a long-standing history of acceptance by courts.

In 1952, a [[Code of Federal Regulations|Federal Regulation]] was adopted that stated in part, "The [[Federal Security Agency]] will regard water supplies containing fluorine, within the limitations recommended
by the Public Health Service, as not actionable under the Federal Food, Drug, and Cosmetic Act."<ref>17 Fed. Reg. 6743 (July 23, 1952).</ref> <!--what exactly did this do?-->

The Supreme Court of [[Oklahoma]] analogized water fluoridation to mandatory vaccination in a 1954 case.<ref name="dowell">273 P.2d 859, 862-63 (Okl. 1954) (available at [http://caselaw.lp.findlaw.com/scripts/getcase.pl?court=ok&vol=/supreme/1954/&invol=1954OK194 FindLaw for Legal Professionals])</ref> The court noted, "we think the weight of well-reasoned modern precedent sustains the right of municipalities to adopt such reasonable and undiscriminating measures to improve their water supplies as are necessary to protect and improve the public health, even though no epidemic is imminent and no contagious disease or virus is directly involved . . . . To us it seems ridiculous and of no consequence in considering the public health phase of the case that the substance to be added to the water may be classed as a mineral rather than a drug, antiseptic or germ killer; just as it is of little, if any, consequence whether fluoridation accomplishes its beneficial result to the public health by killing germs in the water, or by hardening the teeth or building up immunity in them to the bacteria that causes caries or tooth decay. If the latter, there can be no distinction on principle between it and compulsory vaccination or inoculation, which, for many years, has been well-established as a valid exercise of police power."<ref name="dowell">273 P.2d 859, 862-63 (Okl. 1954) (available at [http://caselaw.lp.findlaw.com/scripts/getcase.pl?court=ok&vol=/supreme/1954/&invol=1954OK194 FindLaw for Legal Professionals])</ref>

In the 1955 case ''Froncek v. City of Milwaukee'', the [[Wisconsin]] Supreme Court affirmed the ruling of a circuit court which held that "the fluoridation is not the practice of medicine, dentistry, or pharmacy, by the City" and that "the legislation is a public health measure, bearing a real, substantial, and reasonable relation to the health of the city."<ref>69 N.W.2d 242, 252 (Wis. 1955)</ref>

The Supreme Court of [[Ohio]], in 1955's ''Kraus v. City of Cleveland'', said, "Plaintiff's argument that fluoridation constitutes mass medication, the unlawful practice of medicine and adulteration may be answered as a whole. Clearly, the addition of fluorides to the water supply does not violate such principles any more than the chlorination of water, which has been held valid many times."<ref>127 N.E.2d 609, 613 (Ohio 1955)</ref>

====Fluoridation consensus====

As cases continued to be brought in state courts, a general consensus developed that fluoridation, at least from a legal standpoint, was acceptable.  In 1973's ''Beck v. City Council of Beverly Hills'', the [[California]] Court of Appeal, Second District, said, "Courts through the United States have uniformly held that fluoridation of water is a reasonable and proper exercise of the police power in the interest of public health. The matter is no longer an open question." (citations omitted)<ref name="beck">Beck v. City Council of Beverly Hills, 30 Cal. App. 3d 112, 115 (Cal. App. 2d Dist. 1973).</ref>

====Contemporary challenges====

Though courts have consistently rejected arguments against fluoridation, advocates continue to challenge the spread of fluoridation.  For instance, in 2002, the city of [[Watsonville, California]] chose to disregard a California law mandating fluoridation of water systems with 10,000 or more hookups, and the dispute between the city and the state ended up in court.  The trial court and the intermediate appellate court ruled in favor of the state and its fluoridation mandate, however, and the Supreme Court of California declined to hear the case in February of 2006.<ref>Jones, Donna [http://www.santacruzsentinel.com/archive/2006/February/10/local/stories/07local.htm "Supreme Court turns down Watsonville's appeal to keep fluoride out of its water."] Santa Cruz Sentinel.  February 10, 2006.</ref>  Since 2000, courts in Washington,<ref>Parkland Light & Water Co. v. Tacoma-Pierce County Bd. of Health, 90 P.3d 37 (Wash. 2004)</ref> Maryland,<ref>Pure Water Committee of W. MD., Inc. v. Mayor and City Council of Pure Water Comm. of W. MD., Inc. v. Mayor and City Council of Cumberland, MD. Not Reported in F.Supp.2d, 2003 WL 22095654 (D.Md. 2003)</ref> and Texas<ref>Espronceda v. City of San Antonio, Not Reported in S.W.3d, 2003 WL 21203878 (Tex. App.-San Antonio 2003)</ref> have reached similar conclusions.

===Republic of Ireland===
In ''Ryan v. Attorney General'' (1965), the [[Supreme Court (Ireland)|Supreme Court]] held that water fluoridation did not infringe the plaintiff's right to bodily integrity.<ref>[http://www.bailii.org/ie/cases/IESC/1965/1.html Ryan v. A.G. IESC 1; IR 294 (3 July, 1965)] &mdash; ''text of the Irish Supreme Court's judgement''</ref> However, the court found that such a right to bodily integrity did exist, despite the fact that it was not explicitly mentioned in the [[Constitution of Ireland]], thus establishing the doctrine of [[unenumerated rights]] in Irish constitutional law.

==Medical approval==
{{NPOV}}
Although Japan, Germany, Sweden, Netherlands, Czechoslovakia, Cuba, and the former Soviet Union have stopped water fluoridation, and some reputable scientific organizations oppose water fluoridation<ref>[E.J. Farkas. Water fluoridation in eleven countries. Soc. Sci. Mcd. Vol. 16, pp. 2155 to 2158. 1982]</ref>, more than 100 national and international health service agencies and professional organizations see benefits in community water fluoridation as a means of preventing dental decay.<ref>[http://www.fluoridefacts.org/fluoride/flu_supp_org.asp National and International Organizations that Support Fluoride], from the [http://www.fluoridefacts.org/index.asp Massachusetts Coalition for Oral Health] website, page accessed March 19, 2006.</ref> They include:

*American Academy of Pediatric Dentistry<ref>[http://www.aapd.org/media/Policies_Guidelines/P_FluorideUse.pdf Policy on Use of Fluoride] (in pdf format) from the [http://www.aapd.org/ American Academy of Pediatric Dentistry] website, page accessed April 13, 2006.</ref>
*American Association of Public Health Dentistry<ref>[http://www.aaphd.org/default.asp?page=history.htm American Association of Public Health Dentistry] website, page accessed March 3, 2006.</ref>
*American Dental Hygienists Association<ref>[http://www.adha.org/publichealth/ American Dental Hygienists Association] website, "Public health", page accessed March 3, 2006.</ref>
*[[American Dental Association]]<ref>[http://www.ada.org/public/media/presskits/fluoridation/index.asp American Dental Association] website, page accessed March 3, 2006.</ref>
*American Public Health Association<ref>[http://www.apha.org/legislative/policy/policysearch/index.cfm?fuseaction=view&id=744 American Public Health] website, "Fluoridation", page accessed March 3, 2006.</ref>
*[[Australian Dental Association]]<ref>[http://www.ada.org.au/media/documents/Policies%20and%20Guidelines/April05/FluorideUse2.pdf Australian Dental Association] website's policy on water fluoridation (in pdf format), page accessed March 3, 2006.</ref>
*[[British Dental Association]]<ref>[http://www.bda-dentistry.org.uk/advice/news-template1.cfm?ContentID=899&CFID=2384283&CFTOKEN=93450744 British Dental Association] website on a water bill vote, page accessed March 3, 2006.</ref>
*[[British Medical Association]]<ref name="bmastatment">[http://www.bma.org.uk/ap.nsf/Content/Water+fluoridation British Medical Association] website, statement on water fluoridation, page accessed March 3, 2006.</ref>
*[[Canadian Dental Association]]<ref>[http://www.cda-adc.ca/_files/position_statements/fluorides.pdf Canadian Dental Association] policy on water fluoridation (in pdf format), page accessed March 3, 2006.</ref>
*Canadian Dental Hygienists Association<ref>[http://www.cdha.ca/content/newsroom/pdf/ProbeFluoride.pdf Canadian Dental Hygienists Association] position statement on water fluoridation (in pdf format), page accessed March 3, 2006.</ref>
*[[Centers for Disease Control and Prevention]] (CDC)<ref>[http://www.cdc.gov/oralhealth/waterfluoridation/index.htm CDC] website, page accessed March 3, 2006.</ref>
*European Academy of Paediatric Dentistry<ref>[http://www.eapd.gr/Parents/F_guilines.htm "Guidelines on the use of fluoride in children: an EAPD policy document"], hosted on the [http://www.eapd.gr/index.htm European Academy of Paediatric Dentistry] website, page accessed April 29, 2006.</ref>
*FDI World Dental Federation<ref>[http://www.fdiworldental.org/federation/assets/statements/ENGLISH/Fluoride/Fluoride_dental_caries.pdf Policy statement] (in pdf format) from the [http://www.fdiworldental.org FDI World Dental Federation] on various fluoride therapy, including water fluoridation, page accessed March 3, 2006.</ref>
*International Association for Dental Research<ref name="iadrstatement">[http://www.dentalresearch.org/about/iadr/policy.html International Association for Dental Research] policy statements, including water fluoridation, page accessed March 3, 2006.</ref>
*National Cancer Institute<ref name="nciosteosarcomas">[http://www.cancer.gov/cancertopics/factsheet/Risk/fluoridated-water National Cancer Institute] website, "Fluoridated Water: Questions and Answers", page accessed March 3, 2006.</ref>
*National Institute of Dental and Craniofacial Research<ref>[http://www.nidcr.nih.gov/HealthInformation/DiseasesAndConditions/Fluoride/StoryFluoride.htm National Institute of Dental and Craniofacial Research] website, "The Story of Fluoride", page accessed March 3, 2006.</ref>
*[[World Health Organization]]<ref name="whostatement">[http://www.who.int/water_sanitation_health/oralhealth/en/index2.html World Health Organization] website, "World Water Day 2001: Oral health", page 3, page accessed March 3, 2006.</ref>

== Science reviews ==

There has only been one proper systematic review ever carried out. 
In the United Kingdom the [[Department of Health (United Kingdom)|Department of Health]] funded a systematic review in 1999, which looked at all of the evidence so far published, into the efficacy safety of adding fluoride to drinking water. This work was carried out at the University of York. They concluded:

{{cquote|We were unable to discover any reliable good-quality evidence in the fluoridation literature world-wide.

What evidence we found suggested that water fluoridation was likely to have a beneficial effect, but that the range could be anywhere from a substantial benefit to a slight disbenefit to children's teeth.

This beneficial effect comes at the expense of an increase in the prevalence of fluorosis (mottled teeth). The quality of this evidence was poor.

An association with water fluoride and other adverse effects such as cancer, bone fracture and Down's syndrome was not found. However, we felt that not enough was known because the quality of the evidence was poor.

The evidence about reducing inequalities in dental health was of poor quality, contradictory and unreliable. 

Since the report was published in October 2000 there has been no other scientifically defensible review that would alter the findings of the York review. As emphasised in the report, only high-quality studies can fill in the gaps in knowledge about these and other aspects of fluoridation. Recourse to other evidence of a similar or lower level than that included in the York review, no matter how copious, cannot do this.|30px | 30px| Centre for Reviews and Dissemination | University of York <ref>Centre for Reviews and Dissemination, University of York, York, UK. http://www.york.ac.uk/inst/crd/fluorid.htm Fluoridation of Drinking Water: a Systematic Review of its Efficacy and Safety. Accessed 2007-06-23</ref>
 }}

The report was checked by the [[Medical Research Council (UK)]] after publication.

The current confused state can be better understood by the discovery of the  House of Commons Health Committee'  inquiry into 'The Influence of the Pharmaceutical Industry'  that medical students are seldom taught, neither here nor abroad,  how to properly go about evaluating  a research paper.  The committee  concluded: “This implies a major deficiency in the education of healthcare professionals.” <ref>House of Commons Health Committee. [http://www.publications.parliament.uk/pa/cm200405/cmselect/cmhealth/42/42.pdf' The Influence of the Pharmaceutical Industry].  Fourth Report of Session 2004–05, Vol I, Page 107. Accessed 2007-06-23</ref>

== Characteristic errors ==
{{Quotation|We are concerned about the continuing misinterpretations of the evidence and think it is important that decision makers are aware of what the review really found. As such, we urge interested parties to read the review conclusions in full at:|Centre for Reviews and Dissemination, University of York, York, UK.  Fluoridation of Drinking Water: a Systematic Review of its Efficacy and Safety [http://www.york.ac.uk/inst/crd/pdf/summary.pdf Summary] }}

Occurrences of ''[[Appeal to authority|argumentum ad verecundiam]]'' and ''[[argumentum ad populum]]'' were not recognised for what they were.

==The precautionary principle==

In order to fully prove and understand the nature of fluoridation risks (including the range of doses that can cause the effects, and how these doses vary based on environmental, genetic, and dietary factors) more research is required. But is it ethical to continue exposing entire populations to fluoride in their water while additional long-term studies are carried out to clarify the risks? 

That is the crux of the question posed by an insightful analysis published in the March 2006 issue of the ''Journal of Evidence Based Dental Practice.'' The analysis, written by Joel Tickner and Melissa Coffin, examines the water fluoridation controversy in the context of the “precautionary principle.” The precautionary principle has become a core guiding principle of environmental health regulations in Europe and is based on the notion that:

''"if there is uncertainty, yet credible scientific evidence or concern of threats to health, precautionary measures should be taken. In other words, preventive action should be taken on early warnings even though the nature and magnitude of the risk are not fully understood."''

Without expressing any personal opinions about water fluoridation, Tickner and Coffin note that “The need for precaution arises because the costs of inaction in the face of uncertainty can be high, and paid at the expense of sound public health.” 

In determining whether the precautionary principle should be applied to fluoridation, the authors note that:
	
* There are other ways of delivering fluoride besides the water supply;
		
* Fluoride does not need to be swallowed to prevent tooth decay;
	 	
* Tooth decay has dropped at the same rate in countries with, and without, water fluoridation;
	 	
* People are now receiving fluoride from many other sources besides the water supply;
	 	
* Studies indicate fluoride’s potential to cause a wide range of adverse, systemic effects;
	 	
* Since fluoridation affects so many people, “one might accept a lower level of proof before taking preventive actions.” <ref>Tickner J, Coffin M. (2006). ''What does the precautionary principle mean for evidence-based dentistry?'' Journal of Evidence Based Dental Practice, Issue 6, pages 6-15.</ref>

==Pop culture references==
*In ''[[Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb]]'', General Jack D. Ripper states that fluoridation is a [[communist]] plot: "Do you realize that fluoridation is the most monstrously conceived and dangerous Communist plot we have ever had to face?" [http://en.wikiquote.org/wiki/Dr._Strangelove_or:_How_I_Learned_to_Stop_Worrying_and_Love_the_Bomb#Dialogue]
*In the ''[[Justice League Unlimited]]'' episode "Question Authority", [[Question (comics)|the Question]], a conspiracy obsessed vigilante, is being tortured for information when he claims that fluoridation does not in fact prevent tooth decay, but ''does'' render one's teeth visible by [[spy satellite]].

==References==
<div class="references-small" style="-moz-column-count:2; column-count:2;">
{{reflist|2}} </div>

==External links==
*[http://www.slweb.org/bibliography.html/ A Bibliography of Scientific Literature on Fluoride]
*[http://www.eugeneweekly.com/2005/07/21/coverstory.html Boning Up on Fluoride]  - from [[Eugene Weekly]]
*[http://www.appgaf.org.uk/  All Party Parliamentary Group Against Fluoridation] (UK)
*[http://www.sptimes.com/2007/06/04/Tampabay/Fluoride__a_longtime_.shtml Article on the use of fluoridated water in baby formula]
*[http://www.cdc.gov/fluoridation/ Centers for Disease Control]
*[http://fluoridealert.org/ Fluoride Action Network]

[[ja:水道水フッ化物添加についての議論]]

[[Category:Dentistry]]
[[Category:Fluorine]]
[[Category:Water treatment]]
[[Category:Medical controversies]]
[[Category:Political controversies]]