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Again, there are places where fluoride occurs naturally in drinking water at higher concentrations than it is added artificially and there don't seem to be significant health problems.
Hmmmmm no ! I'm not against fluoride in water, I don't care since I don't live in north america but spreading disinformation does not help.
There is regions, especially in India, where fluoride occurs by naturally in water in high concentration which is causing multiple serious health issues.
Neurology of endemic skeletal fluorosis
"There are higher concentrations of fluoride in water than we usually put in it that is still healthy to drink" != "Any concentration of fluoride in water is safe"
Any substance becomes toxic if you ingest too much of it. If you exceed by a factor of 20 the amount of plenty of things people usually consume, it isn't difficult to find things that are dangerous or even lethal. Say, coffee, beer, anti-inflammatories, chocolate, Coke.
Cool. I said higher concentrations that are added artificially, not extremely high concentration.
I'm simply replying that there is places where fluoride occurs naturally in drinking water at higher concentration that it is added artificially and there is significant health problems in these places.
Does it means that fluoride in low concentration like in the US water system is dangerous ? No, it just means that very high concentration can be dangerous.
I was talking about concentrations in the U.S. I think that should have been obvious.