The study found an increase in concentration of fluoride in pregnant mother's urine of one milligram per liter was associated with a 4.5-point lower IQ score in boys, but not girls, at age three or four.
AFP PHOTO

WASHINGTON D.C.: A study published on Monday linked consumption of fluoridated tap water during pregnancy to lower IQ scores in infants, a finding at odds with decades of public health messaging extolling the mineral's benefits in reducing cavities.

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