Cognitive effects in midlife of long-term cannabis use (Harvard Health)
Research team discovered that individuals who used cannabis long–term (for several years or more) and heavily (at least weekly, though a majority in their study used more than four times a week) exhibited impairments across several domains of cognition. Long–term cannabis users’ IQs declined by 5.5 points on average from childhood, and there were deficits in learning and processing speed compared to people that did not use cannabis…The study also
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