The latest is that if you eat too many potatoes, you get fat.
Well, duh. Oh yes: and potatoes are linked to anencephaly (although our area in Africa had a rate similar to that cited in the literature...most were premies or stillborn so not counted in statistics).
Or could it be that Ireland and Russia have a genetic tendency toward anencephaly?
Or maybe it is socioeconomic: Lower middle class eats french fries/chips, upper class yuppies eat salad.
Not clear from the article, and I didn't peruse the original article.
Similar problem: heartburn drugs and kidney problems.
Well, if you are fat, you are more likely to have GERD/reflux, so take more of them.
And if you are fat, you are more likely to get diabetic kidney disease.
Again I wonder what the original article says, but I am too lethargic to google to find out.