Matthew Johnson, a psychologist at John Hopkins, ran a clinical study centered around psilocybin’s effect on volunteer patients’ smoking addictions. The 15 participants received multiple sessions of cognitive behavioral therapy prior to the administration of two or three doses of psilocybin. Throughout the trial, the volunteers’ carbon-monoxide levels were continually tested to ensure they had refrained from their smoking habit. Though small, and not randomized, the study produced some fascinating results. An inspiring 80% of the participants had remained abstinent six months following the study, an outcome that dropped to 67% at the study’s one-year anniversary. Evidently, the participants who fostered the best results, including many who were able to quit smoking, were the ones who had experienced the most mystical journeys.