Comment: That's why this is news

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That's why this is news

This study was, by and large, testing levels of F- ions that were under 4 mg/L (which is roughly the same as 4 mg/kg or 4 ppm when fluoride and water are the solute and solvents, respectively.). Also, don't think that F- concentrations in water supplies are a constant 0.5 or 1.0 ppm as reported. Fluoride is added in boli, and will be higher in concentration after a bolus has been added, and then follow an extinction curve until more is added.

This paper is legitimate evidence that fluoride concentrations are inversely associated with average IQ in children. The only thing that I would have done differently than this team is left out the two studies where fluorine was ingested from coal burning residues.

I agree with you that there is not convincing evidence that fluoride is harmful to adults in a neurological sense, although there is good evidence that even at low doses it is problematic for people with kidney problems.

This is an issue that needs to be fought, although you're absolutely right that a privatized system would be better. But, this is a blatantly obvious case of crony capitalism, even if you havent seen enough proof of harm. Let ALCOA sell their refinery waste to people who think their kids can afford to lose a few IQ points, and they can have nice teeth.