Can PFAS in adolescents' blood change brain structure?
Yes. Teens with higher PFAS blood levels showed measurable differences in brain size and structure in regions involved in learning and emotion.
What's actually in it
PFAS from nonstick cookware, food packaging, and stain-resistant fabrics accumulate in the body from childhood onward. By adolescence, teens have years of PFAS buildup. Their brains are still developing and particularly sensitive to chemical disruption during this period.
The adolescent brain undergoes major remodeling, pruning some connections and strengthening others. Chemicals that interfere with this process can alter brain architecture.
What the research says
A 2026 study in Environ Res used MRI brain scans to measure brain structure in adolescents from the HOME Study. They compared PFAS blood levels to brain volumes and cortical thickness.
Teens with higher PFAS levels showed differences in brain morphometry, including changes in the volume and thickness of regions involved in learning, memory, and emotional regulation.
The changes were sex-specific. Boys and girls showed different patterns of brain alteration, suggesting PFAS interacts with sex hormones during brain development.
These structural brain changes could explain some of the behavioral and cognitive effects seen in other PFAS studies, including attention problems and lower academic performance.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Serum PFAS concentrations and neuromorphometry in adolescents: The HOME Study. | Environ Res | 2026 |
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