<P> 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 . </P>
<P> 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 . </P>
where is most of the body 's serotonin located
where is most of the body 's serotonin located
the enteric nervous system located in the gastrointestinal tract ( GI tract )
the enteric nervous system located in the gastrointestinal tract ( GI tract )