Marijuana may hurt the developing teen brain Published: March 3, 2014

The brain of a teenager has a lot of developing to do, says NPR.

"Actually in childhood our brain is larger," says Krista Lisdahl, director of the University of Wisconsin-Milwaukee brain imaging and neuropsychology, says it's a mistake for teenagers to use cannabis.

"It's the absolute worst time," she says, because the mind-altering drug can disrupt development. Think of the teen years, she says, as the "last golden opportunity to make the brain as healthy and smart as possible."

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