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Archive for August 18, 2015

Nicotine changes marijuana’s effect on the brain

Study finds nicotine changes marijuana's effect on the brain

How scientists study the effects of marijuana on the brain is changing. Until recently marijuana research largely excluded tobacco users from its participant pool, but scientists have found reason to abandon this practice, uncovering significant differences in the brains of individuals who use both tobacco and marijuana and the brains of those who only use marijuana.