Are parabens from shampoos and lotions found in newborn cord blood?
Yes. Parabens from shampoos, conditioners, lotions, and makeup cross the placenta. A 2026 study found maternal paraben exposure in early pregnancy is associated with altered cord blood hormone levels.
What's actually in it
Parabens (methylparaben, ethylparaben, propylparaben, butylparaben) are preservatives in shampoos, conditioners, body wash, lotions, makeup, and other personal care products. They prevent mold and bacterial growth in water-containing products.
Parabens absorb through skin into the bloodstream. They mimic estrogen and bind to estrogen receptors. Because they're used daily in multiple products, body exposure is continuous. They've been found in urine, blood, breast tissue, and breast milk.
What the research says
A 2026 study on maternal paraben exposure during early pregnancy found that higher paraben levels in mothers during early pregnancy were associated with altered cord blood hormone levels at birth, specifically affecting androgens and thyroid-related markers. The changes were found even at paraben levels typical for women using standard personal care products.
Early pregnancy is a critical window for fetal hormone programming. Disruptions to androgen and thyroid hormone levels during this time can affect brain development and reproductive system development in the fetus.
Switching to paraben-free personal care products is straightforward: many brands now offer them. Look for products that use alternatives like phenoxyethanol or natural preservatives, or that are formulated without preservatives entirely.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Maternal paraben exposure during early pregnancy is associated with altered cord blood hormone levels | Environ Int | 2026 |
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