The straight dope

Long-term marijuana use does not seem to affect mental function adversely.

References:

Lyketsos, C.G., et al. 1999. Cannabis use and cognitive decline in persons under 65 years of age. American Journal of Epidemiology 149(May 1):794.

From Science News, Vol. 155, No. 21, May 22, 1999, p. 331. Copyright © 1999, Science Service.

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