Bedroom HEPA Filters Lower Glucose Spikes

A randomized, controlled study of 150 adults with prediabetes found that placing real HEPA air purifiers in bedrooms (vs sham fans) reduced overall glucose variability by ~8% and cut post‑breakfast extra glucose by ~17% as measured with continuous glucose monitors. The trial focused on PM2.5 removal and supports inflammation‑mediated mechanisms linking particulate inhalation to impaired glucose control. — If replicated and scaled, inexpensive household air filtration could be a practical public‑health intervention to blunt diabetes risk, shifting some responsibility onto housing, environmental and health policy rather than individual lifestyle only.