Psychedelic tryptamines are tryptamine compounds that have psychedelic properties when they are taken. The most common examples of psychedelic tryptamine are psilocybin and DMT. Tryptamines are metabolites of tryptophan, one of the essential amino acids. Not all tryptamines have psychedelic properties, but some of them do. Psilocybin is found naturally in mushrooms, and DMT is found naturally in plants and shrubs, particularly those that grow in the Amazon basin. Psychedelic tryptamines work by influencing the transmission of neurotransmitters throughout the nervous system, including serotonin. Some of the most common effects associated with these types of compounds include changes in visual and auditory sensation.