DMT and other related tryptamines are found in at least twelve plant families and in animals and fungi. The tryptamines bufotenine and O-methyl bufotenine are made by the skin of some toads as well as by several plant species. Magic mushrooms contain the tryptamine psilocybin and its psychoactive derivative psilocin. I will refer to these diverse tryptamines as DMTs unless noted because each has a DMT molecule at its core.
