New research presented at the Alzheimer’s Association International Conference has shed light on the potential impact of wildfire smoke on brain health. The study suggests that exposure to fine particulate matter, specifically PM2.5 particles from wildfires, may pose a greater risk for dementia compared to other sources of air pollution.
The study, conducted in Southern California over a 10-year period, analyzed health records of 1.2 million older adults. Researchers found that for every 1 microgram increase in wildfire particle concentration, the odds of a new dementia diagnosis rose by approximately 21%. In contrast, the risk increased by only 3% for every 3 microgram rise in non-wildfire particles.
While the exact reasons for this disparity remain unclear, experts emphasize the need for further investigation, especially as wildfires become more prevalent. Alzheimer’s Association chief science officer Maria Carrillo highlighted the importance of studying the impact of air pollution on dementia risk, particularly for vulnerable populations with limited ability to avoid unhealthy air.
Health warnings typically advise individuals to stay indoors during poor air quality conditions. However, many individuals, especially those in lower-income brackets or outdoor workers, may face challenges in following these recommendations.
The study underscores the urgency of addressing the potential health consequences of wildfire smoke exposure and the importance of developing strategies to mitigate its impact on brain health.
