Zinc Oxide features as the key active ingredient in many mineral-based physical sunscreens. What is Zinc Oxide? Naturally derived from the mineral Zincite, Zinc Oxide is a white powder which can offer broad spectrum sun protection thanks to its ability to filter and scatter both UVA and UVB radiation. Zinc Oxide may appear visible on the skin when applied, as it is designed to create a physical barrier between our skin and the sun. According to the Cancer Council, sunscreens with Zinc Oxide are usually recommended for more sensitive skin types. Zinc Oxide can also be used as an antibacterial and anti-fungal ingredient in nappy balms and lotions.