Can endocrine-disrupting chemicals in household products affect your thyroid during pregnancy?
Yes. Emerging endocrine disruptors from plastic, cosmetics, and cleaning products disrupted thyroid hormone levels in pregnant women.
What's actually in it
Household products release a mix of endocrine-disrupting chemicals (EDCs) including bisphenols, phthalates, parabens, and PFAS. These come from food containers, personal care products, cleaning supplies, and treated fabrics. During pregnancy, your thyroid produces extra hormones to support both your body and the baby's brain development. EDCs can interfere with this delicate process.
Your thyroid is especially vulnerable during pregnancy because it's working at maximum capacity.
What the research says
A 2026 study in Environ Res measured levels of emerging endocrine-disrupting chemicals in pregnant women and tested their thyroid function. Women with higher EDC levels had altered thyroid hormone profiles, including changes in free T4 and TSH that fell outside the optimal range for pregnancy.
Even small thyroid disruptions during pregnancy can affect the baby's brain development. The thyroid hormones crossing the placenta during the first trimester are essential for fetal brain cell migration and differentiation.
The study found that the mix of chemicals mattered more than any single one. Reducing exposure across the board, by choosing BPA-free and phthalate-free products, using paraben-free cosmetics, and avoiding PFAS-treated fabrics, gives your thyroid the best chance of functioning normally during pregnancy.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Associations between emerging endocrine-disrupting chemicals and thyroid hormone homeostasis in pregnant women. | Environ Res | 2026 |
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