Marijuana or cannabis is one of the most illegally used substances in the world. Preliminary studies have suggested that frequent marijuana users who start at an early age are at a higher risk for cognitive dysfunction and psychiatric illness. A new study published in the journal Psychological Medicine also revealed that adolescents who frequently used cannabis might experience a decline in their Intelligence Quotient (IQ) over time. For the unversed IQ stands for intelligence quotient that measures a person’s intellectual intelligence and potential. It is standardized testing that’s administered by professional psychologists. Marijuana Induced Decline In IQ May Reduce Verbal