Food and environmental factors alter gene expression.
So you could be looking at other factors as well. Maybe people are more emotionally vulnerable because of dietary factors. {More likely than would appear to be the case at face value}
Then that is combined with a host of life indignities and realities in all their human complexity.
It is interesting and not unexpected that it emotion and behaviour link to the inflammatory pathways.
I have just downloaded the PDF - looks like it will be a fascinating read and of particular interest.
Many thanks for posting.
RB
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