Zinc oxide is an active sunscreen ingredient. This mineral acts as a broad-spectrum UV filter by forming a barrier on the skin. Zinc oxide particles layer on top of the skin surface and help protect the skin by reflecting and scattering both UVA and UVB sunrays away.
Zinc oxide is often recognized for its low potential for irritation and skin sensitization.
Zinc oxide is a fine white powder that is insoluble in water, contributing to its water-resistant properties.