I'm not a fan at all. I published a study on a thousand marijuana users until recently, the largest image gene study ever. Every area of the brain is lower in blood flow and activity 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. (02:40–02:48)
CLAIM
Asserts that marijuana use decreases brain blood flow and activity, aging the brain.
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