Can cooking in poorly ventilated kitchens hurt your brain over time?

What's actually in it

Cooking generates particulate matter (PM2.5), volatile organic compounds, polycyclic aromatic hydrocarbons (PAHs), and acrolein. Frying and high-heat cooking produce the most particles. These tiny particles are small enough to travel deep into your lungs and enter your bloodstream. Without a range hood or open window, they build up quickly in your kitchen and spread through your home.

What the research says

A 2026 study in Toxics examined how cooking behaviors and kitchen particulate matter levels relate to cognitive function. The researchers surveyed people about their cooking habits, ventilation use, and cooking methods, then tested their cognitive performance.

People who cooked frequently in poorly ventilated kitchens scored lower on cognitive tests. The association was strongest for people who fried food regularly and rarely used a range hood or opened windows while cooking.

The particles generated during cooking trigger inflammation in the brain when they cross from the lungs into the bloodstream. Over years of daily cooking exposure, this chronic inflammation can damage brain cells and impair memory and processing speed.

The fix is straightforward: always use your range hood while cooking, open a window, and choose lower-heat cooking methods when possible. If your kitchen doesn't have a range hood, a portable air purifier near the stove helps capture some of the particles before you breathe them.