Psilocin, which is also known as psilocyn or 4-HO DMT, is a tryptamine alkaloid compound that is found in high concentrations in psychedelic mushrooms. It is a psychedelic compound that influences the transmission of serotonin throughout the central nervous system. The compound binds to 5 HT2A receptors in the central nervous system, acting as a partial agonist or full agonist. It is a breakdown product of psilocybin, and psilocin has powerful psychedelic, mind-altering effects. The overall experience of someone who ingests psilocin can vary markedly from person to person. A lot of the experiences closely resemble those related to DMT and LSD. Psilocin is a Schedule I controlled substance in the United States.