New research published by the American Medical Association (AMA) finds that while the frequency of marijuana use among adults in Canada increased slightly in the years following nationwide legalization, problematic misuse of cannabis saw modest decreases.

A primary goal of the study was to examine how consumption patterns changed following the country’s legalization of adult-use marijuana, sales of which began in October 2018. Researchers also wanted to understand whether use patterns changed based on how frequently people used cannabis prior to legalization as well as how users’ product preferences changed.

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