Psilocybin is a hallucinogen found in certain kinds of fungus, commonly known as psychedelic or magic mushrooms. While consuming these mushrooms produces short-term drug "trips," research has found that magic mushrooms may lead to a long-term greater sense of well-being and help treat depression.
Another study found the drug could give people a more "open" personality, making them more likely to quit smoking or treat anxiety and depression in cancer patients.