Zinc oxide is a mineral UV filter that sits on top of your skin to physically block both UVA and UVB rays from reaching your skin. It's one of the few sunscreen actives recognized as safe and effective by the FDA, and it doesn't get absorbed into your bloodstream.
Benefits
Provides broad-spectrum UV protection (blocks both UVA and UVB rays)
Mineral/physical blocker — doesn't absorb into skin, making it suitable for sensitive skin and safe during pregnancy
Photostable — doesn't degrade in sunlight
Generally well-tolerated with low risk of irritation or allergic reaction
Potential concerns
Can leave a white cast on skin, especially at higher concentrations needed for adequate protection
May feel heavy or thick in formulation
Science: Zinc oxide is a mineral UV filter with an established safety profile and is not systemically absorbed through skin. Current scientific evidence supports its efficacy and safety for routine sunscreen use, with no associated negative health effects documented. Unlike organic UV filters, it does not contribute to environmental concerns like coral bleaching.
