Serotonin (/ ˌsɛrəˈtoʊnɪn, ˌsɪərə - /) or 5 - hydroxytryptamine (5 - HT) is a monoamine neurotransmitter. Biochemically the indoleamine molecule is derived from the amino acid tryptophan. Serotonin is primarily found in the enteric nervous system located in the gastrointestinal tract (GI tract). However, it is also produced in the central nervous system (CNS), specifically in the Raphe nuclei located in the brainstem. Additionally, serotonin is stored in blood platelets and is released during agitation and vasoconstriction, where it then acts as an agonist to other platelets. Serotonin is popularly thought to be a contributor to feelings of well - being and happiness.
where is most of the body's serotonin located
the enteric nervous system located in the gastrointestinal tract (GI tract)