Younger pot users at risk for brain damage

November 18, 2010 (CHICAGO)

A study presented to the Society for Neuroscience was based on cognitive tests administered to 33 chronic pot smokers. The group was asked to sort playing cards. Those who used pot performed worse than nonsmokers and those who used the most marijuana showed the most impairment.

Those who started out smoking pot before age 16 did even worse. Researchers say this suggests early use of marijuana is associated with greater brain problems.

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