“Forever Chemicals” Found in Most Americans Linked to Faster Biological Aging

Key Takeaways:

• Common environmental chemicals were linked to faster biological aging. Higher blood levels of certain persistent industrial compounds were associated with accelerated epigenetic age, a marker based on DNA methylation patterns.

• Not all exposures behaved the same. Only specific compounds showed strong associations, and the link appeared more pronounced in men, suggesting biological and lifestyle factors may modify risk.

• Environmental load may be part of the longevity equation. While the study doesn’t prove causation, it adds to evidence that long-term chemical exposure could influence aging biology alongside diet, exercise, and genetics.

We tend to think of aging as something shaped by lifestyle and genetics, but environmental exposures matter too. New research suggests some chemicals we encounter daily might be quietly speeding up the aging process in our bodies. 

How Chemical Exposure Is Tied to Biological Age

The study looked at levels of several per- and polyfluoroalkyl substances (PFAS) — a class of persistent industrial chemicals ("forever chemicals") used for decades in everything from non-stick cookware and food packaging to waterproof fabrics and firefighting foams. Two specific compounds, PFNA and PFOSA, were detected in about 95 % of participants’ blood samples. 

Using epigenetic clocks — biological age estimates based on DNA methylation patterns — researchers found that higher levels of PFNA and PFOSA were strongly associated with accelerated biological aging, especially in men between ages 50 and 64.

Notably, other PFAS that showed up in most people’s blood weren’t linked to these epigenetic aging signals. That suggests not all PFAS are equal in how they interact with human biology.

Why This Matters for Longevity

Aging is shaped by more than diet, exercise, and genetics. Long-term environmental exposures appear to leave biological marks as well, influencing how cells regulate and express DNA over time.

Epigenetic age — estimated through DNA methylation patterns — is one of the better tools we have for tracking biological aging. Higher levels of certain persistent industrial chemicals were associated with accelerated epigenetic aging in this study, suggesting environmental exposures may quietly contribute to long-term health trajectories.

The fact that stronger associations were observed in men also underscores that environmental effects aren’t uniform. Biology, lifestyle, and exposure patterns likely interact in complex ways.

This is observational research, so it doesn’t establish causation. Still, it adds to a growing body of evidence that cumulative chemical exposure belongs in the broader longevity conversation. Protecting long-term health may involve paying attention not just to what we add to our bodies, but also to what we’re chronically exposed to over decades.

Reducing exposure is possible.

Practical steps include using a high-quality water filter certified to reduce PFAS, minimizing non-stick and stain-resistant products, avoiding grease-resistant food packaging when possible, and checking consumer reports for PFAS-free cookware and textiles. Small reductions in chronic exposure may matter over decades.

References:

Ya-Qian Xu, Chongyu Ding, Hui Zhang, Yulu Gong, Darong Hao, Xuetong Zhao, Kai Li, Xiangwei Li. Emerging PFAS contaminants PFNA and PFSA amplify epigenetic aging: sex- and age-stratified risks in an aging population. Frontiers in Aging, 2026; 6 DOI: 10.3389/fragi.2025.1722675