According to a 2015 article published in the annals of gastroenterology, the gut-brain axis consists of “bidirectional communication between the central and the enteric nervous system, linking emotional and cognitive centers of the brain with peripheral intestinal functions.” The central nervous system being the brain and spinal cord, whereas the enteric nervous system includes nerves within the esophagus, stomach, small and large intestines, pancreas, gallbladder and biliary tree…