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Canadian Cannabis Five Times More Potent than 20 Years Ago

Summary by Barrie Today
Medical journal article examines impact of high-potency, legal marijuana on people with mental health disorders

6 Articles

A medical study released Monday warned that the potency of marijuana in Canada has increased fivefold over the past 20 years, increasing the risk of psychosis among users, especially young men. The study, conducted by the Canadian Medical Association Journal (CMAJ), found that the tetrahydrocannabinol (THC) content, the psychoactive component of cannabis, in most legal marijuana in Canada is now 20%, up from 4% at the beginning of the century. T…

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Vida Newspaper broke the news in on Monday, August 18, 2025.
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