Part three of our mini-series centered on brain health. Professor Frederick Barrett is based in the Department of Psychological & Brain Sciences at Johns Hopkins School of Medicine and Associate Director at the Center for Psychedelic and Consciousness Research. Fred and his colleagues investigate the therapeutic effects of psychoactive substances in intractable patient populations, including those with depression, opioid use disorder and cognitive impairments. Listen as we talk about the different types of hallucinogenic mushrooms, whether psychedelics could one day treat neurodegeneration and the remedial value of a bad “trip.”