News Release 

Increasing Google searches for marijuana chemical component CBD

JAMA Network Open

Bottom Line: Google searches from 2004 through April 2019 were used to measure U.S. public interest in cannabidiol (CBD), a chemical component of marijuana. Searches from the United States that mentioned "CBD" or "cannabidiol" were stable from 2004 through 2014 before substantial increases in search volumes of almost 126% in 2017 compared with 2016 and 160% during 2018 compared with 2017. There were 6.4 million Google searches for CBD during April 2019 and year-over-year forecasted search volumes are expected to increase nearly 118% during 2019 compared with 2018. A limitation of this observational study is that Google searches may reflect interest in CBD rather than interest in its use. Researchers urge that attention to CBD be a public health priority because of the growing interest that surrounds it to understand who uses it and why, and to evaluate its effects and potential drug interactions.

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Authors: John W. Ayers, Ph.D., M.A., University of California San Diego, and coauthors


Editor's Note: The article includes conflict of interest disclosures. Please see the article for additional information, including other authors, author contributions and affiliations, financial disclosures, funding and support, etc.


Media advisory: To contact corresponding author John W. Ayers, Ph.D., M.A., email Louise Canton at The full study is linked to this news release.

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About JAMA Network Open: JAMA Network Open is the new online-only open access general medical journal from the JAMA Network. Every Wednesday and Friday, the journal publishes peer-reviewed clinical research and commentary in more than 40 medical and health subject areas. Every article is free online from the day of publication.

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