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In the Johns Hopkins study, half of the 51 participants were given a low dose of psilocybin as control, followed by a high dose five weeks later. (For the other half, the order of the doses was reversed.) The results were remarkable: Six months later, 78 percent of the participants were less depressed than they started, as rated by a clinician, and 83 percent were less anxious. Furthermore, 65 percent had almost fully recovered from depression, and 57 percent from their anxiety, after six months. By comparison, in past studies antidepressants have only helped about 40 percent of cancer patients, performing about as well as a placebo. - www.theatlantic.com