The use Marijuana increases chances for developing a psychosis. It was attributed to the increased dopamine levels after the use of cannabis. A new study argues there is no connection between dopamine levels in striatum and cannabis. The study doesn’t contend the psychosis statistics, suggesting there must be a different trigger – mindhacks.
They should look into possibilty that psychosis is a precondition for being a pot head and not visa versa.
Further Reading:
Robert Sapolsky on Toxoplasmosis
The Pain and the Pleasure of being a Redhead