Adult-use cannabis in California has brought quite a few changes to the state, including easier access to needed medicine and a thriving cannabis tourism scene. However, there has been no marked increase in young adult cannabis use since the start of legalization. 

The recently published study, which was published in the Addictive Behavior journal and conducted by the University of California at San Diego, looked at cannabis use within a group of 563 young adults, all ages 18 to 24. All the adults resided in California in the years just prior to cannabis legalization, and the trends were monitored based on their activity throughout the study.