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Addiction

08 June 2011

Marijuana smoking affects brain chemistry

Imaging scans show that chronic daily use of marijuana, or dagga, can have a detrimental effect on the brain, according to a new report.

Imaging scans show that chronic daily use of marijuana can have a detrimental effect on the brain, according to a new report.

In conducting the study, researchers compared the brains of 30 chronic daily marijuana smokers to non-smokers over the course of roughly four weeks. Using molecular imaging, researchers were able to visualise changes in the participants' brains and found the cannabinoid CB1 receptors of the smokers had decreased by roughly 20% compared to the otherwise healthy people with limited lifetime exposure to marijuana.

Brains of pot smokers

 

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