Check out this much larger (n=8000 instead of n=555) and more in depth study in a developed nation (UK). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1790799/

Check out this much larger (n=8000 instead of n=555) and more in depth study in a developed nation (UK). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1790799/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1790799/ Teaser quote: In a large representative population study of more than 8000 British men and women, intelligence in childhood was associated with a vegetarian diet in mid-adulthood, and this was independent of educational attainment and social class.