What patterns of cannabis use are the most likely to increase someone’s chances of developing psychosis? That’s the question a team of U.K. researchers set out to answer using data from 901 first-episode psychosis patients across Europe and Brazil. The results of their analysis, published Tuesday in The Lancet, describe a clear correlation between daily, high-potency cannabis consumption and psychotic episodes. Yet lead researchers acknowledged that the correlation does not necessarily mean cannabis is the cause of psychosis.
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