A of the University College of London has found that consuming cannabis has no impact on a child’s IQ.

The study, which included 2,612 children, examined IQ scores at age 8, and again at 15. They found “no relationship between cannabis use and lower IQ at age 15,” even when other factors such as alcohol use, cigarette use and maternal education were taken into account. Researchers found that even heavy cannabis had no effect on a person’s IQ.

Researchers did find, however, that alcohol is “strongly associated with IQ decline”. Besides alcohol, researchers found “No other factors were found to be predictive of IQ change.”

“This is a potentially important public health message- the belief that cannabis is particularly harmful may detract focus from and awareness of other potentially harmful behaviours”, lead author Claire Mokrysz said in a press release.

The results of this research were presented over the weekend at the annual meeting of the European College of Neuropsychopharmacology.


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