The real question is why is the US so high? Our rates are almost as high as India's, with 1/3 the population. I have a feeling it is likely diet related, and possibly due to either the "low fat" craze not providing building blocks in the brain or the industrial fats (in particular trans fats but maybe the massive quantities of n-6 fats) causing structures to be built incorrectly or causing excess inflammation.

So, that's my hypothesis based on having done a lot of nutrition research but no Parkinson's research. Does anybody have any real info about why the US rates are so high?