A large UK study has raised new concerns about the impact of long-term benzene exposure on older adults, finding a 44% increase in the risk of developing allergic rhinitis among those with higher exposure levels. The research, which analyzed annual residential benzene exposure estimates from 2006 to 2020, also found a connection between benzene and increased all-cause mortality in this age group.
Benzene, a chemical commonly found in crude oil and gasoline, is already known for its health risks, but this study sheds light on its possible role in allergic diseases, especially among seniors. The investigation didn’t stop at just environmental exposure. Researchers factored in four biological ageing markers and a genetic risk score based on 35 genetic variants tied to allergic rhinitis. These extra layers helped clarify why some people might be more vulnerable than others.
Genetic Risk and Ageing Add to the Picture
Perhaps most striking, participants in the highest genetic risk tertile had a 54% higher hazard of developing allergic rhinitis compared with those in the lowest-risk group. That means genetic susceptibility—not just the air you breathe—can make a big difference in your risk level.
The study’s deeper dive into biological ageing revealed that it could partly explain the association between benzene exposure and allergic rhinitis. In other words, as we age biologically, our bodies may become more susceptible to the harmful effects of environmental chemicals like benzene. Genetic differences also appear to play a significant role, with some individuals naturally at higher risk.
Implications for Older Adults
The findings suggest that even relatively low concentrations of benzene in the environment may be enough to raise the risk of allergic rhinitis in older adults. This is especially relevant given the prevalence of benzene in everyday urban settings. The research highlights the importance of considering both environmental exposures and individual susceptibility—through ageing and genetics—when assessing allergic disease risk.
In summary, this study underscores the need for ongoing monitoring of benzene levels in residential environments and may prompt further research into how ageing and genetics interact with pollutants to affect our health.
