Why eat fermented vegetables? In the meantime, because for decades, adults and children with mood disorders, arthritis, multiple sclerosis, coeliac disease, learning disorders, mental and psychiatric disorders such as: autism, hyperactivity, attention disorders, dyslexia, dyspraxia, depression, schizophrenia, bipolar and obsessive-compulsive disorder, various eating disorders, epilepsy and much more and improvements, interruptions of the active phase of the disease or regression in many cases have been shown, simply with the dictates of the GAPS diet. The GAPS diet protocol would have as its primary key the daily consumption of fermented foods. A certain prophylaxis, then, even in healthy subjects, cats and humans, would not hurt. Moreover, they are so easy to prepare that, from the point of view of costs and benefits, we would see the latter rise dramatically and exponentially, despite the former. They improve general mood and mental health; They contribute to the regression or di