What if improving your brain health was as simple as improving the air you breathe?
A new study co-authored by UConn researcher Nicholas Pellegrino suggests that using a HEPA air purifier may provide cognitive benefits for adults over 40. The findings, recently published in Scientific Reports and featured in The Conversation, add to growing evidence that reducing exposure to air pollution can have meaningful impacts on overall health—including brain function.
The study examined 119 adults between the ages of 30 and 74 living in an area with high levels of traffic-related air pollution. Participants used a HEPA air purifier in their homes for one month and a sham purifier for another month. Researchers then measured changes in cognitive performance using tests that assessed memory, processing speed, mental flexibility, and executive function.
Among participants age 40 and older, researchers observed a 12% improvement in performance on tasks related to executive function and mental flexibility after using the HEPA purifier. While the improvement was modest, the effect was comparable to cognitive benefits associated with increasing daily physical activity.
Air pollution has long been linked to respiratory and cardiovascular disease, but researchers are increasingly recognizing its effects on the brain. Exposure to fine particulate matter has been associated with neurological conditions and changes in white matter, the brain tissue responsible for communication between different regions of the brain. HEPA filters remove many of these harmful airborne particles, potentially reducing their impact on cognitive health.
While more research is needed to better understand exactly how cleaner air influences brain function, these findings highlight an important and often overlooked factor in healthy aging: the quality of the air around us. Future studies will explore whether reducing air pollution exposure may help protect brain health over the long term and potentially slow cognitive decline.
Congratulations to Nicholas Pellegrino on the publication of his first academic paper in The Conversation. His work contributes to a growing body of research demonstrating how environmental factors shape health outcomes and underscores the importance of clean air for healthier communities.