“Marijuana can lead to insanity”
This is true, but only in part: excessive use of marijuana can lead to a relapse or exacerbation of existing mental disorders. So if the word “schizophrenia” is paved with formidable letters in a medical card, then one better suspend use of cannabis. Everyone else has absolutely nothing to fear.
Moreover, the researchers have found that one of the main components of marijuana, cannabidiol, can neutralize some psychotic symptoms. But this should already be practiced exclusively by a doctor’s prescription! You can read more about this in Dr. Peter Gates’ work.