Psilocybin is a compound found in many species of mushrooms that creates psychoactive and psychedelic effects, which may include alterations in sensation, cognition, and emotion. Psilocybin can be synthesized to better ensure the purity, potency, and accuracy of doses. Researchers use this synthetic form in their clinical trials. Psilocybin mushrooms may be more commonly referred to as ‘magic mushrooms’ or ‘shrooms’.