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Teen marijuana use may cause permanent intelligence drop

Parents who think that their kids marijuana habit makes them less intelligent now have some research to back them up.

A new study finds that regular cannabis users under the age of 18 suffered an irreversible drop in IQ.
The study is published in the Proceedings of the National Academy of Sciences. It followed 1000 people for 20 years. The study controlled for other factors, including alcohol and tobacco use, mental illness, and education level.

Daybreak host, Chris Walker, sat down with Zach Walsh to discuss the study.  He's an assistant professor of psychology at UBC Okanagan and
a clinical psychologist who's involved in several studies looking at marijuana.

The study is posted here.

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