Scientists say positive effects of "magic mushrooms" can last up to a year

From the Raw Story:

Magic mushroom’s positive effects lasting over a year, say researchers

By Eric W. Dolan
Wednesday, June 15th, 2011 -- 4:45 pm

Scientists at the Johns Hopkins University School of Medicine claim to have determined the proper dose levels needed to create positive changes in attitudes, mood, life satisfaction, and behavior that persist for more than a year with the psychoactive substance in so-called "magic mushrooms."

The findings are the latest in a series of experiments done at Johns Hopkins to investigate psilocybin, a psychedelic substance contained in certain mushrooms. The findings were published online this week in the peer-reviewed journal Psychopharmacology.

“In cultures before ours, the spiritual guide or healer had to discern how much of what type of mushroom to use for what purposes, because the strength of psychoactive mushrooms varies from species to species and even from specimen to specimen," said Roland Griffiths, Ph.D., a professor of psychiatry and behavioral sciences and neuroscience at the Johns Hopkins University School of Medicine and the study's lead scientist.

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