Can PFAS exposure change a baby's appetite and eating behavior?

What's actually in it

PFAS (per- and polyfluoroalkyl substances) get into babies' bodies from day one. They're in stain-resistant baby bibs and clothing, nonstick cookware used to prepare formula, water used to mix bottles, and food packaging. PFAS also pass from mother to baby through the placenta during pregnancy and through breast milk after birth.

These "forever chemicals" don't break down. A baby born today already carries some amount of PFAS in their blood, inherited from their mother's lifetime of exposure.

What the research says

A 2026 study in Clinical Nutrition measured PFAS levels in infants and tracked their eating behavior and appetite hormones through the first two years of life.

Babies with higher PFAS exposure had altered levels of adipokines, which are hormones produced by fat cells that regulate appetite and metabolism. These include leptin (the "I'm full" signal) and other hormones that tell the brain when to eat and when to stop.

The changes in hormone levels matched up with actual changes in eating behavior. Babies with disrupted adipokine levels showed different feeding patterns compared to less-exposed infants. When the hormones that control hunger and fullness don't work right, a baby can't properly self-regulate how much they eat.

This matters for long-term health. Eating patterns set in infancy can shape weight and metabolism for years. A baby whose hunger signals are chemically scrambled may be at higher risk for childhood obesity and metabolic problems down the road.

To lower your baby's PFAS exposure, use glass baby bottles and stainless steel sippy cups. Avoid stain-resistant bibs and baby clothing. If your tap water has PFAS contamination, use a filter certified to remove them before mixing formula. Choose fresh foods over packaged ones whenever you can.