Can PFAS exposure during pregnancy disrupt thyroid hormones needed for baby's brain?
Some Concern
What's actually in it
PFAS from nonstick pans, food wrappers, and tap water build up in a pregnant woman's blood. Thyroid hormones are critical for fetal brain development, especially in the first trimester when the baby depends entirely on the mother's thyroid. PFAS can interfere with how the body makes, transports, and uses these hormones.
What the research says
A 2026 study in Environ Sci Technol used metabolomic analysis to understand exactly how PFAS disrupt thyroid hormones during pregnancy. The researchers found that PFAS exposure altered metabolic pathways that act as a bridge between PFAS and thyroid disruption. These metabolic changes mediated the link between PFAS levels and abnormal thyroid function.
Even small changes in maternal thyroid hormones can affect the baby's brain growth, IQ, and learning ability. The study identified specific metabolites that could serve as early warning markers of PFAS-related thyroid problems.
Get your thyroid levels checked early in pregnancy. Reduce PFAS exposure by filtering your water, avoiding nonstick cookware, and choosing uncoated food packaging. These steps protect both your thyroid and your baby's brain.
The research at a glance
What to use instead
Browse our vetted, non-toxic alternatives. Every product is third-party certified.
Shop Non-Toxic Baby