A thorough review of how microbial dysbiosis of different regions impacts on health. The dysbiosis of the Intestinal Microbiota stands out, since it is the one that occupies the highest percentage and, where the greatest number of investigations have been carried out. The different axes that have sprung from the studies are determined, highlighting the brain-gut microbiota axis. The various bi-directional communications between the microbiota and the different organs are analyzed and as this communication is significant in the loss of health.

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