You see the disaster we have with our mental health. Teenagers who use marijuana in their 20s have an increased risk of anxiety, depression, suicide and psychosis. 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. (02:32–02:41)
CLAIM
Asserts that Daniel Amen published a large study on marijuana users.
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