A new study referenced in “PM10 found to be the strongest driver of liver damage” from AirQualityNews conducted in Xiamen City, China, tracked over 23,000 older adults and investigated their exposure to air pollutants in relation to liver health. The researchers determined that PM₁₀ (particulate matter with a diameter of 10 micrometers or less) emerged as the strongest contributor to liver damage in this population—surpassing other common pollutants in impact.
While the report doesn’t provide numerical effect sizes or detailed mechanistic insights, its key takeaway is the particularly pronounced role of PM₁₀ in driving liver injury among older adults.
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Sometimes called fatty liver disease, MASLD affects roughly 30% of the global population and can progress to liver fibrosis, a type of scarring that raises the risk of cirrhosis and liver cancer.
Researchers measured long-term exposure to ozone, carbon monoxide, sulfur dioxide, PM2.5 and PM10. They then analysed how those exposures related to the severity of liver fibrosis among participants.
They found that people exposed to the highest levels of PM10 were almost twice as likely to develop liver fibrosis compared to those with the lowest exposure. Elevated levels of ozone, carbon monoxide, sulfur dioxide and PM2.5 also increased risk, though to a slightly lesser extent. Among all the pollutants studied, PM10 emerged as the strongest driver of liver damage.
When researchers looked at the combined effects of multiple pollutants, the picture grew more concerning. Exposure to a mix of pollutants significantly raised the likelihood of liver fibrosis, reinforcing the idea that people are rarely affected by a single pollutant in isolation.
KEY TAKEAWAYS–
The study emphasizes PM₁₀ as a particularly strong predictor of liver damage among older adults.
Complementary evidence—especially from animal models and epidemiological research—underscores that PM₂.₅ also poses a serious threat to liver health, even at relatively low concentrations.
Together, these findings highlight a growing body of evidence that air pollution—both fine and coarse particulates—can harm the liver, by promoting inflammation, metabolic disruption, fibrosis, and overt disease.
