@ Sophisticate
Then how do you explain Amish low schizophrenia rate?
Amish consume double of what regular Somali speaking person in North America do.
Let me point out that a one-size-all approach to nutrition does not work. Similarly, what works for the Amish will not work for other groups i.e. the Masai of East Africa, that don't consume processed sugar or grain. They also have staggeringly low rates of chronic disease and mental illness. This advantage is not conferred when they migrate to the cities and live like urbanites- which are less physically active with poorer diets. Make no mistake walaal, there is more to mental health than diet alone, physical activity, proper rest, hydration, and stress management act as buffers to the disease.
I should also add that the grain harvesting practices used by the Amish are leagues better than the ones used today. Remember, they are stuck in the 1700s. For instance, their wheat is pesticide-free, has less gluten content, because they actually ferment it/sprout it. The wheat of today is hybridized and overconsumed. And trust me, it can contribute to or exacerbate gastrointestinal problems and emotional issues. Let's not forget that the Amish are a tightly-knit community, whilst most city dwellers in the west have less communal support. Social cohesiveness is another buffer to mental illness. And the Amish certainly don't have that in short supply.