I'm quoted here expressing scepticism about the very unconvincing new study in JAMA Pediatrics that claims that maternal fluoride exposure is linked to lower IQ scores in their children:https://www.sciencemag.org/news/2019/08/drinking-fluoridated-water-during-pregnancy-may-lower-iq-sons-controversial-study-says …
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Iodine shortages certainly make a difference. Lead seems to: there could be other undiscovered factors whose effects are big enough to care about. And such factors might well be easy to fix - iodine shortage was.
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Replying to @gcochran99 @OPulteney12 and
Then of course there's Factor X; an as of yet undiscovered enviromental particle that affects all American blacks, no American whites, and is significantly more detrimental to IQ than lead exposure and iodine deficiency put together.
3:44 PM - 21 Aug 2019
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