Evolutionary psychiatrist Emily Deans speculates that abnormal behavior in us “zoo humans” could be related to a processed food diet. The implication? Primarily eat an ancestral diet (emphasis mine):
One aspect of our environment that we do have a modicum of control over is our diet. It is a worthwhile endeavor to stick to human-appropriate foods the majority of the time. A core diet of enriched processed foodstuffs augmented by plenty of fruits and vegetables didn’t keep the zoo primates from acting strangely or developing heart disease and autoimmune colitis. There is no reason to consider enriched processed food, even those labeled as containing “whole grains” and carrying the heart healthy check you see on many cereal boxes, to be any healthier for the minds and bodies of human beings. Build the diet around unprocessed foods. It is likely our modern diets are more risky for our brains than the similar standard zoo diets are for our primate cousins.