The national academy has a very nice writeup on "The Health Effects of Cannabis and Cannabinoids: The Current State of Evidence and Recommendations for Research (2017)" which is by far the most comprehensive guide I'm aware of. http://nationalacademies.org/hmd/reports/2017/health-effects... The conclusions summary PDF has the highlights: http://nationalacademies.org/hmd/~/media/Files/Report%20File... Personally, i fi…
It's just one data point, but worth looking into further.