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Study: Emails More Damaging to IQ Than Marijuana


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Marijuana IQ

A British study by TNS Research revealed that workers who are distracted by phone calls, emails and text messages tend to suffer a greater loss of IQ than someone using marijuana.

Dr. Glenn Wilson, a psychiatrist at King’s College London University, conducted 80 clinical trials for TNS Research by monitoring the IQ of workers throughout a day. He found that the IQ of those who tried to juggle work as well as messages fell by 10 points, which is the the equivalent to missing a whole night’s sleep and more than double the 4-point decrease caused by using marijuana.

“This is a very real and widespread phenomenon,” stated Wilson. “We have found that this obsession with looking at messages, if unchecked, will damage a worker’s performance by reducing their mental sharpness. Companies should encourage a more balanced and appropriate way of working.”

The study also revealed that the IQ drop was even more significant in men.





State-mandated warning:


Do not use marijuana if you are under twenty-one years of age or pregnant. Keep marijuana out of reach of children.


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Arizona legalized marijuana for recreational use in November 2020. The law allows adults aged 21+ to purchase, possess and use cannabis. State-licensed cannabis dispensaries began selling recreational marijuana in early 2021. There are over 150 dispensaries in Arizona — a majority of them are in populous areas such as Phoenix, Tucson and Flagstaff. Recreational cannabis delivery services began operating in 2024.  


AZ Cannabis Updates