Is sunscreen safe during pregnancy?

What does the evidence say about sunscreen during pregnancy?

1. Choose a mineral sunscreen like titanium dioxide or zinc oxide: these sit on top of your skin as a physical block rather than being absorbed into it. 1
2. Oxybenzone specifically has already been restricted in some coastal regions over reef damage, and many chemical sunscreen filters haven't been well studied in human pregnancy at all. 1
3. After normal, everyday use, four widely used chemical filters (avobenzone, oxybenzone, octocrylene, and ecamsule) reached blood levels above the FDA's own threshold for requiring more safety testing. 2
4. Six other common active ingredients (avobenzone, oxybenzone, octocrylene, homosalate, octisalate, and octinoxate) also crossed that same blood-level threshold in a follow-up FDA trial, though the researchers were clear this isn't a reason to stop using sunscreen. 3
5. Melasma affects roughly half to two-thirds of pregnancies to some degree on sun-exposed facial skin, and daily broad-spectrum sunscreen with physical blockers like titanium dioxide and zinc oxide is the preferred choice for managing it. 4

Is sunscreen safe in each trimester?

• First trimester. There's no special first-trimester rule, but it's a good time to switch to a mineral sunscreen and build the daily habit. Rising hormone levels can start priming your skin's pigment cells before any darkening is visible, so a broad-spectrum SPF 30 or higher mineral lotion each morning is a good place to start.
• Second trimester. Melasma, the patchy facial darkening sometimes called the mask of pregnancy, usually shows up in the second trimester as hormone levels climb further. This is exactly when sun protection starts to matter more, not less: reapply every two hours outdoors, wear a wide-brim hat, and avoid peak midday sun alongside your sunscreen.
• Third trimester. By the third trimester, any dark patches that have developed are usually at their most visible. Daily mineral sunscreen, hats, and shade remain the best way to limit further darkening, and it's worth keeping up these habits after birth too, since melasma can take months to fade even after hormone levels drop.