Tryptamine is an indolamine metabolite of the essential amino acid, tryptophan. The chemical structure is defined by an indole - a fused benzene and pyrrole ring, and a 2-aminoethyl group at the third carbon. The structure of tryptamine is a shared feature of certain aminergic neuromodulators including melatonin, serotonin, bufotenin and psychedelic derivatives such as dimethyltryptamine (DMT), psilocybin, psilocin and others. Various amounts of tryptamine and related indolamine alkaloids are present in plants, fungi and animals. Tryptamine has been shown to activate trace amine-associated receptors expressed in the mammalian brain, and regulates the activity of dopaminergic, serotonergic a...