Fluoride concentrations in drinking water above public health guidelines may lower children’s IQ, according to a National Toxicology Program review published Wednesday.
The US health agency’s final, long-awaited report about fluoride’s hazards tackles the science debated for years in an ongoing federal trial about the mineral.
NTP concludes it has “moderate confidence” that exposures to fluoride concentrations in drinking water higher than the 1.5 milligrams per liter (mg/L) recommended by the World Health Organization are associated with lower IQ in children.
That’s more than double the federal government’s recommendation for fluoride concentrations in drinking water in the US, currently 0.7 ...
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