What's actually in baby sunscreen and which ingredients are safe?

What's actually in it

Sunscreens fall into two types: chemical filters and mineral filters. Chemical UV filters like oxybenzone, avobenzone, homosalate, and octinoxate absorb UV light by undergoing a chemical reaction on the skin. They also absorb through the skin into the bloodstream quickly. Several are endocrine disruptors.

Mineral filters, zinc oxide and titanium dioxide, sit on the skin surface and reflect UV. They don't absorb well through intact skin. They're the safer choice for infants.

What the research says

Researchers in a 2026 study in Pediatr Dermatol analyzed popular sunscreens marketed for babies and children. They found that many products labeled for infants still contained chemical UV filters including oxybenzone. The researchers flagged the mismatch between marketing claims of baby-safety and the presence of chemicals with known hormone-disrupting properties.

Infants under 6 months shouldn't use sunscreen at all, according to pediatric guidelines. The main protection should come from shade and protective clothing.

For older babies: look for sunscreens with only zinc oxide or titanium dioxide as active ingredients. Keep the ingredient list short. Organic cotton baby gear like lightweight long-sleeve shirts provide UV protection without any chemicals.