The gut is also the largest storage facility for serotonin in our body. Ninety-five percent of the body’s serotonin is stored in these warehouses. Serotonin is a signaling molecule that plays a crucial role within the gut-brain axis: It is not only essential for normal intestinal functions, such as the coordinated contractions that move food through our digestive system, but it also plays a crucial role in such vital functions as sleep, appetite, pain sensitivity, mood, and overall well-being.
