By Dr. Priyom Bose, Ph.D. Reviewed by Lauren Hardaker Aug 13 2025 New research reveals that a simple home air purifier could be a powerful tool for cutting high blood pressure and protecting heart health for people exposed to highway pollution. Study:  Effect of HEPA Filtration Air Purifiers on Blood Pressure: A Pragmatic Randomized Crossover Trial . Image credit: Proxima Studio/Shutterstock.com A study published in JACC conducted a randomized crossover trial to assess whether in-home high-