Regarding the positive effects of magic mushrooms, there have been studies into psilocybin which have found a stronger link to increased mental well being than this study did.
http://healthland.time.com/2011/06/16/magic-mushrooms-can-improve-psychological-health-long-term/
http://healthland.time.com/2011/06/16/magic-mushrooms-can-improve-psychological-health-long-term/
In their study, the Hopkins scientists were able to reliably induce transcendental experiences in volunteers, which offered long-lasting psychological growth and helped people find peace in their lives — without the negative effects.
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