Now recreational use has exploded to the point where it has overtaken alcohol, and there’s still no sound science on the benefits of medical marijuana. Marijuana is a disaster. It’s infinitely worse than alcohol on every metric, especially mental health. The scientific evidence is incontrovertible that marijuana triggers psychosis [2] in susceptible people. 
For example, a large-scale Danish study published in the American Journal of Psychiatry in 2017 found that up to 30% of young men’s schizophrenia could have been prevented if they had not used pot.