'''Serotonin''' or '''5-Hydroxytryptamine''' (5-HT) is a [[neurotransmitter]] synthesized from the [[amino acid]] [[tryptophan]] and found in the [[central nervous system]], the gastrointestinal tract and [[platelets]]. | '''Serotonin''' or '''5-Hydroxytryptamine''' (5-HT) is a [[neurotransmitter]] synthesized from the [[amino acid]] [[tryptophan]] and found in the [[central nervous system]], the gastrointestinal tract and [[platelets]]. |