Smoking strong marijuana daily increases risk of psychosis, study finds

(CBS News, March 20) According to a new study, smoking potent marijuana every day can increase the likelihood of developing a psychotic disorder by almost five times.  

Looking at data from across Europe and Brazil from 2010 to 2015, researchers from King’s College London compared about 900 mental health clinic patients diagnosed with a psychosis disorder episode to more than 1,200 health patients. They found that daily marijuana use was more common in the group that experienced a psychosis disorder.

"If you decide to use high-potency marijuana, you should bear in mind: Psychosis is a potential risk," Dr. Marta Di Forti, the study’s lead author, said. Read more.