> That is why some people can thrive on a diet that would repel most of us and 
> why others can follow a strict diet (paleo for example) and not be able to lose 
> weight. There is no question that PCOS (poly-cystic ovarian syndrome) has a 
> genetic cause and probably only a minute (if any) environmental factor link.

Actually PCOS is related to hyperinsulinism, with the threshold being determined by genetics.