PFAS Exposure in Childhood Linked to Lower Bone Density in Adolescents

Early-life exposure to per- and polyfluoroalkyl substances (PFAS) may impact bone development during adolescence, potentially increasing the risk of fractures and osteoporosis later in life, according to new research published in the Journal of the Endocrine Society. These “forever chemicals,” commonly found in water, food, and consumer products, are raising concerns about their long-term health consequences.

What are PFAS?

Per- and polyfluoroalkyl substances (PFAS) are a group of man-made chemicals that are resistant to heat, water, and oil. They are used in a wide range of products, including nonstick cookware, firefighting foam, and food packaging. Because of their widespread use and persistence in the environment, PFAS can accumulate in the human body.

The Study Findings

Researchers analyzed blood samples from 218 adolescents who had been part of a long-term pregnancy and birth cohort. PFAS levels were measured at birth and at ages 3, 8, and 12. Bone density was assessed at age 12. The study revealed that teens with higher levels of perfluorooctanoic acid (PFOA) in their blood tended to have lower bone density in the forearm.

The associations between PFAS levels and lower bone density varied depending on the timing of exposure, suggesting that certain developmental stages may be particularly vulnerable. these associations were more pronounced in females than in males.

Why Bone Density Matters During Adolescence

Adolescence is a critical period for building strong bones and achieving optimal bone mass. Maximizing bone mass during these formative years can reduce the lifelong risk of fractures and osteoporosis.

Expert Perspective

“Our findings suggest reducing PFAS exposure during key developmental windows could support healthier bones throughout life,” said Jessie P. Buckley, Ph.D., M.P.H., of the UNC Gillings School of Global Public Health in Chapel Hill, N.C.

Future Research

Further research is needed to determine whether PFAS exposure leads to changes in bone mineral density (BMD) throughout adolescence and adulthood, and if it increases the risk of osteoporosis or fractures later in life.

Key Takeaways

• Early-life exposure to PFAS may negatively impact adolescent bone development.
• Higher levels of PFOA were associated with lower bone density in the forearm.
• The effects of PFAS exposure on bone density may vary depending on the timing of exposure and sex.
• Reducing PFAS exposure during childhood and adolescence could promote healthier bone development.

These findings underscore the importance of ongoing efforts to reduce PFAS contamination in drinking water and consumer products.