Frederick S. Barrett, director of the Center for Psychedelic and Consciousness Research at Johns Hopkins School of Medicine and professor in the Neuropsychopharmacology of Consciousness in the department of Psychiatry and Behavioral Sciences, talks about the use of psychedelics for mental illness and the effects of President Trump's executive order speeding up research.

Photo: Tabernanthe iboga, a shrub with hallucinogenic properties, grows in Cameroon. (Credit: Marco Schmidt via Wikimedia Commons CC 2.5)

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