A U.S. government report expected to stir debate concluded that fluoride in drinking water at twice the recommended limit is linked with lower IQ in children.
The report, based on an analysis of previously published research, marks the first time a federal agency has determined — “with moderate confidence” — that there is a link between higher levels of fluoride exposure and lower IQ in kids. While the report was not designed to evaluate the health effects of fluoride in drinking water alone, it is a striking acknowledgment of a potential neurological risk from high levels of fluoride.
Fluoride strengthens teeth and reduces cavities by replacing minerals lost during normal wear and tear, according to the U.S. Centers for Disease Control and Prevention. The addition of low levels of fluoride to drinking water has long been considered one of the greatest public health achievements of the last century.
“I think this (report) is crucial in our understanding” of this risk, said Ashley Malin, a University of Florida researcher who has studied the affect of higher fluoride levels in pregnant women on their children. She called it the most rigorously conducted report of its kind.
Fluorides, like all trace elements, naturally occur in many water sources. The reason water flouridation caught on initially was because of the strong correlation between locations with water supplies naturally high in fluoride and better dental health.
Indeed. Here in the UK, people can request that their water company should add it in if their water supply is low-fluoride, for instance from a reservoir, and the water company must add it in.
Back when I used to work in water, that was always the stuff that gave me nightmares. Concentrated hexafluorosilicic acid is what we’d use for dosing. We’d test all the equipment in the chemical room on plain water, drain it out and then literally brick up the doorway. Site would be evacuated during delivery - delivery guy would connect everything up in a space suit, hop in the shower afterwards. Lasted for ages and ages, since you only need the tiniest drip in the water supply to get what you need, but the tiniest drip on your skin would be enough to kill you as well; its lethal dosage is horrifically small.
Made working with all the other halides much less of a concern - we use shed loads of chlorine, but that stuff is much much less nasty in comparison.
Yeah. You know how “hillbillies” are always portrayed as having bad teeth in old media? That’s because the water in Appalachia is low in fluoride.
(And fluoridated toothpaste didn’t exist back then.)
It also caught on because the water treatment process removes the naturally occurring fluoride. If your water comes from an underground source rather than a lake they’re likely putting back less than was taken out.