How Adding Iodine To Salt Resulted In A Decade's Worth Of IQ Gains For The United States

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    Jul 25, 2013 9:11 AM GMT
    Pretty interesting...

    http://www.businessinsider.com/iodization-effect-on-iq-2013-7

    "A new NBER working paper from James Feyrer, Dimitra Politi, and David N. Weil finds that the population in iodine-deficient areas saw IQs rise by a full standard deviation, which is 15 points, after iodized salt was introduced. Since one quarter of the population lived in those areas, that corresponds to a 3.5 point increase nationwide. We’ve seen IQs go up by about 3 points every decade, something called the Flynn effect, so iodization of salt may be responsible for a full decade’s worth of increasing IQ in the U.S."
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    Jul 25, 2013 9:49 AM GMT
    could have fooled me lol

    Its a joke b4 all you yankees get mad
  • Posted by a hidden member.
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    Jul 25, 2013 2:52 PM GMT
    boomerangOz saidcould have fooled me lol

    Its a joke b4 all you yankees get mad


    It's the fluoride cancelling it out! (Joking...)
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    Jul 25, 2013 3:16 PM GMT
    We're all bloated, water-retaining geniuses! Yea!
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    Jul 25, 2013 3:27 PM GMT
    They used to add iodine to bread too. People are encouraged to reduce salt consumption, which results in a reduction of iodine as well. Many people in the U.S. don't get enough of this essential mineral. I'm not sure about the IQ link, but I definitely noticed health benefits when I started supplementing iodine.
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    Jul 25, 2013 3:51 PM GMT
    These sorts of conclusions are always pretty tenuous because many changes were going on at the same time. But supposedly there's also a measureable IQ increase due to phasing out lead from gasoline.

    Dunno... when we all running on ethyl, nobody was wearing their pants down below their ass...
  • mitshoo

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    Jul 25, 2013 4:01 PM GMT
    Yeah I heard about this type of thing in my bioanthropology class, but I forget what the point was. Anyway, I wonder where we used to get our iodine before? Where does iodine occur naturally in foods?
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    Jul 25, 2013 4:14 PM GMT
    mitshoo saidAnyway, I wonder where we used to get our iodine before?
    Civilizations for centuries suffered from goiters & mental retardation in parts of the world prone to iodine deficiencies. Since iodine wasn't a known mineral to most of human civilization, it was a matter of winning the geographic lottery (marine societies, mostly). It's still a huge problem for about a third of human population even today.
  • mitshoo

    Posts: 76

    Jul 25, 2013 4:19 PM GMT
    If that's true, if we are so dependent on iodine, I wonder if that means we evolved near the sea for a time.
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    Jul 25, 2013 4:50 PM GMT
    mitshoo saidIf that's true, if we are so dependent on iodine, I wonder if that means we evolved near the sea for a time.


    The national geographic geneological study shows that we evolved along the coasts. Goiter is actually a big problem in continental areas.
  • musclmed

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    Jul 27, 2013 7:49 AM GMT
    riddler78 saidPretty interesting...

    http://www.businessinsider.com/iodization-effect-on-iq-2013-7

    "A new NBER working paper from James Feyrer, Dimitra Politi, and David N. Weil finds that the population in iodine-deficient areas saw IQs rise by a full standard deviation, which is 15 points, after iodized salt was introduced. Since one quarter of the population lived in those areas, that corresponds to a 3.5 point increase nationwide. We’ve seen IQs go up by about 3 points every decade, something called the Flynn effect, so iodization of salt may be responsible for a full decade’s worth of increasing IQ in the U.S."


    iodine in the diet is important. But no longer a problem in the US.

    for the few out there who would run out and take a whole bunch of iodine right now ( stupid people).

    taking high dose iodine actually reduces thyroid function temporarily.

    It only helps if you are deficient in iodine.

    Pregnant women is a different story. Of late i have seen several pregnant women need iodine supplements because essentially they eat dirt and birdseed ( Vegans) .
    There is a vegetarian solution. Sea-weed chips

    Have some seafood once in a while and you will be fine.