function of its widespread presence remains undetermined. Structurally , DMT is analogous to the neurotransmitter   serotonin  (5-HT), the  hormone   melatonin , and other  psychedelic tryptamines, such as  5-MeO-DMT ,  bufotenin , and  psilocin  (the active metabolite of  psilocybin ). Meditation increases melatonin   Melatonin, one of the principal hormones