No Evidence To Support Cannabis/Schizophrenia Link

A brain and mental health researcher is strongly arguing that there is no link between cannabis use and developing schizophrenia.

Matthew Hill, PhD of the University of Calgary's (Canada) Hotchkiss Brain Institute, writing in Nature, notes that there is no concrete evidence of a connection between cannabis and schizophrenia. As he points out, the incidence of schizophrenia has not gone up since the 1960s, when marijuana use became popular in the U.S. and Europe. In addition, countries in which a large segment of the population uses cannabis do not have higher schizophrenia rates.

However, Hill concedes that marijuana use might bring on schizophrenia earlier in those who are predisposed to the condition.

One of the first studies to indicate a link between marijuana and schizophrenia came out in 1987 in Sweden. It found Army soldiers who used cannabis were found to have a higher incidence of schizophrenia. However, Hill points out that...

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