Photo Credit: Opra

In her latest blog post [3], US National Institute on Drug Abuse director Nora Volkow claims that ‘science should guide marijuana policy.” But if the nation’s top anti-drug doc truly believes that facts, not ideological rhetoric, ought to shape America’s drug policies, why does she feel the need to keep distorting the truth about pot?

Writes Volkow: ‘Besides being addictive, marijuana is cognitively impairing even beyond the phase of acute intoxication and regular use during adolescence may cause a significant, possibly permanent IQ loss.”

Or, more than likely, it may not. In fact, the very study Volkow relies on to make this questionable claim was publically repudiated in a 2012 review [4] published in the Proceedings of the National Academy of Sciences. That review suggests that socioeconomic differences, not pot use, are responsible for dissimilarities found among former teen marijuana users and non-users. In fact, once economic variables were factored into the assessment, the analysis reported that cannabis’ actual effect on IQ was likely to be ‘zero.”

As for Nora Volkow’s allegation […]