Psychobiotic Nonsense One component of a book called The Psychobiotic Revolution is scientifically reasonable – that the human gut biome contains trillions of beneficial microbes. And that disturbing that biome can have adverse effects on physical and mental health. One more reasonable theory has been that oral consumption of antibiotics harms these gut bacteria. But the authors of The Psychobiotic Revolution create a nexus that defies reasonableness – that processed food harms the gut biome and contributes to mental health problems.  The U.S. Department of Agriculture defines a processed food as one that has undergone any changes to its natural state. This includes foods that have been cut, washed, heated, pasteurized, c...