Air pollution likely to be causing dementia, say UK science advisersWe know that air pollution is bad for our lungs and heart, but now advisers to the UK government say it can also be linked to dementia and cognitive decline in older people
Air pollution is likely to be contributing to dementia and a declining mental ability in older people around the world, science advisers to the UK government have said for the first time.
The opinion from the authoritative Committee on the Medical Effects of Air Pollutants (COMEAP) adds significant weight to a growing number of studies linking dirty air to cognitive decline.
In a report published today, the group said that after reviewing nearly 70 studies it had concluded the evidence now suggested an association between exposure to air pollutants and “an acceleration of the decline in cognitive function often associated with ageing, and with the risk of developing dementia.” To date, air pollution has largely only been firmly linked to physical health impacts on the lungs, heart and other organs.
Frank Kelly at Imperial College London, who started working on the report three years ago, says the amount of research suggesting a link to mental decline had “snowballed” in recent years. “Dementia is one of the greatest, if not the greatest, global challenge for health and social care in the 21st century,” he says.
The committee said that it couldn’t put a number on how many older people had seen a mental decline linked to air pollution, largely due to a scarcity of investigative studies that might provide causal evidence. However, Kelly says that a 2018 study of people in London indicated roughly 60,000 of the 209,600 new cases of dementia in the UK each year could be due to poor air quality.
The report identifies three main mechanisms for how air pollution could be accelerating mental declines. Chief among these is the damage done to blood vessels by tiny particulate matter, which can affect blood supply to the brain: dementia can result from a reduction in blood supply to brain cells. There are a number of human, as well as animal, studies showing the effect pollution can have on blood vessels.
More tentative explanations include the brain’s immunological system being activated by exposure to pollution and the very smallest particles directly reaching the brain via the nasal passage and the nerve cells that give our sense of smell, the olfactory bulb. The evidence for these other two mechanisms is slimmer, and the committee has much higher confidence in the blood vessel one, says Kelly.
“Thanks to an immense amount of work in the last several years, we can say with confidence this link exists,” says Brian Castellani at Durham University, who was not involved in the report. It shows exposure to dirty air in early life can have significant later-life impacts on brain health, he says.
Stefan Reis at the UK Centre for Ecology and Hydrology says: “The findings of COMEAP are not surprising, but add further weight to the understanding that air pollution health impacts are much wider and likely more profoundly affecting public health beyond the traditionally known immediate effects.”Air pollution likely to be causing dementia, say UK science advisers | New Scientist
Pollution Masks since 1993 - The 'Original' and still the best - Made in the UK
THE AIR WE BREATHE
The Respro® Bulletin Board is designed to keep you up to date with current views and issues relating to Air Pollution and its health implications in our daily lives.
WATCH OUR ANIMATION
TOP POSTS AND PAGES
- Strawberry plants measure air quality
- Increased Air Pollution Can Take A Decade Off Your Life
- Respro® Masks FAQ: What's the difference between N95 and P1 mask standards?
- Iranian football matches postponed as air pollution soars
- Tipping point: revealing the cities where exercise does more harm than good
- Follow Respro® Bulletin Board on WordPress.com
LOCAL AIR QUALITY
Click the map to find out about current air quality levels where you live.
WHY WEAR A MASK?
Essential features required of a mask to work properly: Why wear a mask?
For information on the products we provide please visit our website respro.com Respro® will ship your order of any product, any quantity to anywhere on the planet free of charge.
KEY POINTS TO A MASK
Three important points to look out for in an air pollution mask:
Key Points to a Mask
TIME TO CHANGE YOUR FILTER?
THERE ARE FOUR RESPRO® FILTER TYPES
HOW TO CHANGE THE FILTER
BUY NEW FILTERS
RESPRO® ON INSTAGRAM
Air Pollution Air Quality Asthma Beijing Boris Johnson California Canada China Delhi Department for Environment Food and Rural Affairs (Defra) diesel exhaust fumes EU - European Union Europe forest fire France Germany HAZE Health Effects of Air Pollution India Indonesia Iran King's College London London London Mayor Malaysia Nitrogen Dioxide NO2 NOx Ozone O3 Paris PM - Particulate Matter PM2.5 PM10 Research Respro® Masks FAQ Respro® Products Scotland Singapore Smog Sulfur Dioxide SO2 Thailand UK USA vehicle emissions wildfires World Heath Organization (WHO)
- Air Quality
- Australia & Oceania
- Exercise & Air Pollution
- Health Effects of Air Pollution
- Help & FAQs
- Latin America
- Medical Studies
- Middle East
- Research on Air Pollution in the UK
- Respro® How To Videos
- Respro® Mask Reviews
- Respro® Masks
- Respro® Products
- South Korea
- USA & Canada
- World News