Are oxybenzone and other UV filters in pregnancy slowing down babies' brain development?
Possibly. Higher prenatal UV-filter exposure tracks with worse cognition and behavior in young kids.
What's actually in it
Chemical UV filters, including oxybenzone (BP-3), octinoxate, and others, soak into the bloodstream after a single sunscreen application. They're hormone disruptors. In pregnancy, they cross the placenta and reach the developing baby.
That's why dermatologists and OB-GYNs increasingly recommend mineral-only zinc oxide sunscreens during pregnancy.
What the research says
A 2026 study in Environ Pollut followed a birth cohort and matched maternal UV-filter levels in pregnancy with child cognition and behavior tests at age 5. Higher UV-filter exposure tracked with worse cognitive scores and more behavior problems. The link was strongest for boys.
The dose came mostly from daily sunscreen use plus tinted moisturizers and lipsticks with SPF.
For pregnancy, switch to mineral-only zinc oxide sunscreen and skip SPF makeup with chemical filters. Wear a hat and seek shade for sun protection. After pregnancy, the same change is good for kids if they grab mom's sunscreen.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Prenatal exposure to ultraviolet filters and children's cognitive and neurobehavioral development: A longitudinal study. | Environ Pollut | 2026 |
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