As many as 30 percent of schizophrenia cases among young men may be linked to heavy marijuana use, according to a new study of more than six million people in Denmark.
The study, published this month in Psychological Medicine, also found the proportion of new schizophrenia cases linked to cannabis use disorder has risen consistently since the 1970s, likely due to the increasing potency of the drug that many view as harmless.
This is not a lone study, just one of a growing number raising the alarm.
