HEPA Air Purifiers Boost Brain Function in Just One Month

Topic: Environment

A study found that using a HEPA air purifier for one month improved brain function in adults over 40. The improvement was small but significant, similar to the benefits of daily exercise.

Researchers studied 119 people living in Somerville, Massachusetts, which has high levels of traffic-related air pollution. They randomly assigned participants to use either a real HEPA air purifier or a sham one for one month, followed by a break and then the opposite treatment. After each month, participants took a test that measured their mental capacity, including visual memory, motor speed, executive function, and mental flexibility.

The study found that people over 40 who used the real HEPA air purifier performed 12% better on tasks related to executive function and mental flexibility compared to when they used the sham purifier. This improvement is similar to the cognitive benefits of regular exercise. The researchers also noted that even small decreases in cognitive functioning can be associated with a higher risk of death.

The study's findings are especially relevant for people living near highways or major roadways, who are exposed to more air pollution and have higher rates of air pollution-related diseases. People of color and low-income individuals are disproportionately affected by this issue. The researchers suggest that HEPA air purifiers may offer meaningful health benefits in these circumstances.

It's worth noting that the study only looked at short-term use of HEPA air purifiers, and it's unclear how longer durations might affect cognitive function. Future research is needed to explore this question.

Why It Matters

This study matters because air pollution affects millions of people in India, especially those living near highways or major roadways. Using HEPA air purifiers may be a simple and effective way to improve brain function and reduce the risk of cognitive decline.

Key Facts

• 119 people participated in the study, aged 30-74.
• The study was conducted in Somerville, Massachusetts, which has high levels of traffic-related air pollution.
• Participants used either a real HEPA air purifier or a sham one for one month, followed by a break and then the opposite treatment.
• People over 40 who used the real HEPA air purifier performed 12% better on tasks related to executive function and mental flexibility compared to when they used the sham purifier.
• Even small decreases in cognitive functioning can be associated with a higher risk of death.

Key Terms

HEPA

High Efficiency Particulate Air, an air purification technology that removes particulate matter from the air.

Executive function

The ability to plan, organize, and manage tasks and resources.

Implications

This study matters because air pollution affects millions of people in India, especially those living near highways or major roadways. Using HEPA air purifiers may be a simple and effective way to improve brain function and reduce the risk of cognitive decline.