Dimethyltryptamine (DMT), also known as N,N-dimethyltryptamine, is a naturally occurring tryptamine and human neurotransmitter. It is not to be confused with 5-MeO-DMT and is similar in chemical structure to the neurotransmitter serotonin. DMT is created in small amounts by the human body during normal metabolism by the enzyme tryptamine-N-methyltransferase. Many cultures, indigenous and modern, ingest DMT as a psychedelic in extracted or synthesized forms.