A British study of more them 8,000 men and women aged 30 whose IQs had been measured when they were 10, showed that the higher the IQ, the greater the odds of being a vegetarian.
For each 15-point rise in IQ scores in the study, the likelihood of being a vegetarian rose by 38 percent. Even after adjusting to factors such as social class and education, the link was still consistent.
At first blush, my thought would be that since smarter people read more and are better informed, it stands to reason that they might believe that a vegetarian diet would be better for them and therefor decide to follow one. Of course, this reasoning would apply only to people smart enough to keep up with the mainstream hogwash; the exceptionally smart people would, of course, see through it all to the next level of knowledge and be followers of non-vegetarian, low-carb diet.
I haven’t had a chance to dig into the paper to see what is really going on here, but if this statistic holds up, I suspect it’s nature’s way of regressing to the mean.