American Journal of Psychiatry
Cannabis, Psychosis, and Mortality: A Cohort Study of 50,373 Swedish Men
|Swedish male military conscripts who had used pot 50 times or more before the age of 18 were 40% more likely than their abstemious peers to be dead by age 60. Legalize it if you want, but don't call it "safe." And, yeah, yeah, correlation can't prove causation, but correlational studies are how we know that tobacco isn't safe. You can't randomly assign some people to smoke a lot of dope and then others to serve as a control. There are underlying factors at work as to why some Swedish kids became potheads and others didn't AND there are underlying reasons why some people smoke cigarettes for 20 years and others don't.