Nano zinc oxide ek mineral (inorganic) UV filter hai jo sunscreens mein use hota hai — yeh broad-spectrum UVA aur UVB protection deta hai. Iska nanoscale particle size hone ki wajah se skin par woh typical white cast kam nazar aata hai jo normal zinc oxide mein dikhai deta hai. Yeh mainly scattering ke through kaam karta hai.