My knowledge of fluorine is that in water treatment it's good in small doses(like pretty much everything) We kinda need fluoride to protect the enamel on our teeth. Like seriously we'd probably have no teeth left without the fluoride ion
Exactly – it’s one of those cases where an understanding of the oft-quoted ‘the dose makes the poison’ adage is vital. Of course, fluoride in high doses can cause problems, such as dental fluorosis, and even skeletal fluorosis in higher concentrations. There was a relatively recent case of a woman who drank tea made from 100 teabags, every day for 17 years, who developed skeletal fluorosis (so yeah, newsflash, if you don’t like fluoridation of the water supply, better not drink tea either!).
Numerous studies have shown the benefits of topical fluoride vs. tooth decay. It’s really not an effect that’s up for debate. Though there have been debates over whether water fluoridation is the most effective way to accomplish this, some studies have shown that even in areas where fluoridated toothpaste is used, water fluoridation still lowered tooth decay rates. Either way, really, there’s no scientific doubt that the concentrations of fluoride being used to fluoridate water supplies are safe.