Satoshi Kanazawa (some Social Science guy at the London School of Economics) posted a [url=http://personal.lse.ac.uk/kanazawa/pdfs/O2013.pdf]journal[/url] in 2013 which looked in to the correlation of childhood IQ and the chance of being obese as an adult.
If you can't be bothered reading it and the pic is nonsense to you then basically:
[i]The less intelligent you are/were as a kid, the more chance you have/had at being obese when you're older - and vice-versa. [/i]
Good luck.
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Makes sense. But there are exceptions