“A study reported Sept. 5 by neuroscientists at Indiana University finds that a non-psychoactive compound in cannabis called cannabidiol, or CBD, appears to protect against the long-term negative psychiatric effects of THC, the primary psychoactive ingredient in cannabis.” https://www.news-medical.net/news/20170906/Cannabidiol-appears-to-protect-against-long-term-negative-psychiatric-effects-of-THC.aspx

“CBD may protect against psychiatric risk from high-THC cannabis strains. IU neuroscientists find cannabidiol reduces symptoms such as impaired memory in adolescent mice simultaneously exposed to THC”  https://news.iu.edu/stories/2017/09/iub/releases/06-cbd-study.html