UofL receives $3.6 million to research health…


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uofl-receives-$3.6-million-to-research-health…
UofL researchers Matthew Nystoriak, left, and Alex Carll, right, have received a $3.6 million grant from the National Institutes of Health and Food and Drug Administration to study the effects of flavorings used in vapes and electronic cigarettes.

The University of Louisville has received a $3.6 million grant from the National Institutes of Health and Food and Drug Administration to study the effects of flavorings like mango and bubblegum used in vapes and electronic cigarettes.

“E-cigarettes are still relatively new, and we don’t yet fully understand what their health effects are,” said Alex Carll, an assistant professor in the Department of Physiology and co-lead on the project. “Understanding this could help us make better purchasing and regulatory decisions.”

The U.S. Food and Drug Administration has

banned the use of unauthorized flavors 

used in disposable e-cigarette cartridges, saying some could appeal to kids and help fuel rising rates of youth vaping. However, a wide variety of flavors are still available in liquid form.

Matthew Nystoriak, an associate professor of medicine and co-lead on the project, said some flavors may seem harmless because they taste like or use the same ingredients as in food. But while those ingredients are safe to eat, they may not be safe to inhale.

Some flavors used in vapes, like diacetyl (artificial butter flavoring), have been linked to serious and even deadly health conditions like “

popcorn lung

” — damage caused by airway inflammation.

“Our goal is to understand how individual flavoring chemicals impact the heart,” Nystoriak said. “There are many flavor chemicals used in e-cigarettes and if we know which are potentially more harmful than others, it’s possible for people to make more informed decisions about which products they use.” Identifying their biological effects also is likely to help the FDA in regulating flavoring additives in e-cigarettes in the future.

This work builds on significant research already being conducted by UofL and its Envirome Institute

that examines environmental factors affecting human health

, including the trends and impacts of vaping and e-cigarettes. In 2020, the American Heart Association

invested nearly $17 million

to fund work to better understand the drivers behind youth vaping, the health effects of this use and how to motivate young people to stop using these products.

According to the

Centers for Disease Control and Prevention

, in 2022, 4 percent of American middle school students (470,000) and 13.4 percent (2.55 million) of high school students reported recently using e-cigarettes. Nearly 85% of youth who report using e-cigarettes say they use flavored e-cigarettes.


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