Jeg synes selv at fluorineret drikkevand virker som en dårlig idé. Så vidt jeg ved er evidensen ret svag for en positiv effekt på tænderne, og der er artikler ude som kunne tyde på at kronisk eksponering for højt fluoridindhold i drikkevandet ikke er helt sundt:
Abstract
Background: Recently, in a cross-sectional study of 201 children in Araihazar, Bangladesh, exposure to arsenic (As) in drinking water has been shown to lower the scores on tests that measure children's intellectual function before and after adjustment for sociodemographic features.
Objectives: We investigated the effects of As and fluoride exposure on children's intelligence and growth.
Methods: We report the results of a study of 720 children between 8 and 12 years of age in rural villages in Shanyin county, Shanxi province, China. The children were exposed to As at concentrations of 142 ± 106 µg/L (medium-As group) and 190 ± 183 µg/L (high-As group) in drinking water compared with the control group that was exposed to low concentrations of As (2 ± 3 µg/L) and low concentrations of fluoride (0.5 ± 0.2 mg/L) . A study group of children exposed to high concentrations of fluoride (8.3 ± 1.9 mg/L) but low concentrations of As (3 ± 3 µg/L) was also included because of the common occurrence of elevated concentrations of fluoride in groundwater in our study area. A standardized IQ (intelligence quotient) test was modified for children in rural China and was based on the classic Raven's test used to determine the effects of these exposures on children's intelligence. A standardized measurement procedure for weight, height, chest circumference, and lung capacity was used to determine the effects of these exposures on children's growth.
Results: The mean IQ scores decreased from 105 ± 15 for the control group, to 101 ± 16 for the medium-As group (p < 0.05) , and to 95 ± 17 for the high-As group (p < 0.01) . The mean IQ score for the high-fluoride group was 101 ± 16 and significantly different from that of the control group (p < 0.05) . Children in the control group were taller than those in the high-fluoride group (p < 0.05) ; weighed more than the those in the high-As group (p < 0.05) ; and had higher lung capacity than those in the medium-As group (p < 0.05) .
Conclusions: Children's intelligence and growth can be affected by high concentrations of As or fluoride. The IQ scores of the children in the high-As group were the lowest among the four groups we investigated. It is more significant that high concentrations of As affect children's intelligence. It indicates that arsenic exposure can affect children's intelligence and growth.
Key words: arsenic, children, fluoride, growth, IQ, water. Environ Health Perspect 115:643–647 (2006) . doi:10.1289/ehp.9270 available via
http://dx.doi.org/ [Online 9 January 2007]
Der er en del andre (også mere velfunderede) artikler ude, men jeg har ikke tid til det store litteraturstudie lige nu. Umiddelbart synes jeg bare det virker til at potentielle risici ved fluorinering af drikkevandet overskygger de potentielle gavnlige effekter. Men det kan godt være jeg bare skulle tage sølvpapirshatten på.
Det naturlige fluorindhold i dansk drikkevand er generelt ret lavt. Der er dog lige nu overvejelser om hvorvidt der ville være en gevinst ved at tilsætte fluor til drikkevandet:
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Skulle du nu ikke bare lade være med at forsøge at diskutere kemi mens du stadig har en lillebitte smule ære i behold?
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