Childhood PFAS Exposure Linked to Lower Teen Bone Density
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- Researchers at the University of North Carolina and collaborating institutions analyzed blood samples from 218 adolescents in a long-term pregnancy and birth cohort, measuring PFAS levels at delivery and at ages 3, 8, and 12, then assessing bone density at age 12.
- Study findings showed that teens with higher blood levels of perfluorooctanoic acid (PFOA) had lower bone density in the forearm, according to the paper published in the Journal of the Endocrine Society.
- Lead author Jessie P. Buckley, Ph.D., of the UNC Gillings School of Global Public Health, said the link between PFAS and bone density varied depending on when exposure occurred, suggesting certain developmental windows are more sensitive to these chemicals.
- Gender difference: the association between PFAS levels and lower bone density was stronger in females than in males, the study found.
- Collaborating institutions included Johns Hopkins Bloomberg School of Public Health, Brown University, the CDC, the University of Cincinnati College of Medicine and Cincinnati Children's Hospital, the University of Pennsylvania, Simon Fraser University, and George Washington University's Milken Institute School of Public Health.
- Buckley said reducing PFAS exposure during key developmental windows could support healthier bones throughout life, framing adolescence as a critical period for achieving optimal bone mass to reduce lifelong fracture and osteoporosis risk.
- Funding came from the National Institute of Environmental Health Sciences, with Buckley calling for efforts to reduce PFAS contamination in drinking water and consumer products.
Why it matters: Adolescence is a critical window for bone mass accumulation, and the study suggests that PFAS contamination—which persists in water, food, and consumer products—may quietly compromise skeletal development in children, with girls appearing more vulnerable. If the developmental-window finding holds up, it gives regulators and parents a more targeted reason to prioritize exposure reduction during early childhood rather than treating PFAS as a uniformly timed threat.
