I'm not a fan at all. I published a study on a thousand marijuana users until recently, the largest imaging study ever. Every area of the brain is lower in blood flow and activity [in marijuana users]. makes your brain look older than you are now. I've known that for a long time. I'm also a child psychiatrist and parents would bring me their 16 year old child and they go, I think he has add. (11:23–11:27)
CLAIM
Asserts that marijuana use decreases brain blood flow and activity.
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