In two new studies, researchers found an association between vaping and mental fog.
Both adults and kids who vape were more likely to report difficulty concentrating, remembering, or making decisions than their non-vaping, non-smoking peers.
It also appeared that kids were more likely to experience mental fog if they started vaping before the age of 14.
The research was conducted by a team from the University of Rochester Medical Center (URMC).
While other studies have found an association between vaping and mental impairment in animals, the team is the first to draw this connection in people.
The studies analyzed over 18,000 middle and high school student responses to the National Youth Tobacco Survey and more than 886,000 responses to the Behavioral Risk Factor Surveillance System phone survey from U.S. adults.
Both surveys ask similar questions about smoking and vaping habits as well as issues with memory, attention and mental function.
Both studies show that people who smoke and vape—regardless of age—are most likely to report struggling with mental function.
Behind that group, people who only vape or only smoke reported mental fog at similar rates, which were significantly higher than those reported by people who don’t smoke or vape.
The youth study also found that students who reported starting to vape early—between eight and 13 years of age—were more likely to report difficulty concentrating, remembering, or making decisions than those who started vaping at 14 or older.
The team says adolescence is a critical period for brain development, especially for higher-order mental function, which means tweens and teens may be more susceptible to nicotine-induced brain changes.
While e-cigarettes lack many of the dangerous compounds found in tobacco cigarettes, they deliver the same amount or even more nicotine.
While the two studies clearly show an association between vaping and mental function, it’s not clear which causes which.
It is possible that nicotine exposure through vaping causes difficulty with mental function. But it is equally possible that people who report mental fog are simply more likely to smoke or vape—possibly to self-medicate.
One author of the study is Dongmei Li, Ph.D., an associate professor in the Clinical and Translational Science Institute at URMC.
The study is published in Tobacco Induced Diseases and Plos One.
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