Is there a link between PFAS exposure and childhood obesity?

What's actually in it

PFAS (per- and polyfluoroalkyl substances) are a group of man-made chemicals often called forever chemicals because they do not break down in the environment or your body. They are used to make products resistant to water, grease, and stains.

These chemicals are pervasive. They have been detected in drinking water, as noted in a 2026 study in Environ Res. Because they build up in the body over time, exposure during pregnancy is a significant concern for developing children.

What the research says

The science shows a clear connection between early life exposure to these chemicals and physical development. A 2026 study in J Hazard Mater found a direct association between prenatal PFAS exposure and catch-up growth in children who were born with adverse health outcomes. This type of rapid, abnormal growth is a known risk factor for future health issues.

The impact of these chemicals extends into adolescence. A 2026 study in Environ Res examined how prenatal and adolescent exposure to PFAS affects pubertal development and endocrine hormones in girls. The findings highlight how these chemicals interfere with the body's natural hormone systems, which are critical for healthy growth and weight regulation.

Peer-reviewed research continues to uncover how these chemicals disrupt normal biological processes. While the specific link to obesity is part of a larger conversation on metabolic health, the evidence is clear: PFAS exposure is linked to disrupted growth patterns during the most critical stages of a child's life.