Category: topical
Aliases: ZnO, Mineral sunscreen active
Inorganic mineral UV filter — primary mechanism is absorption (not reflection, despite common belief) across UVB + UVA1 + UVA2. Broadest single-molecule spectrum. Photostable. Non-nano formulations leave visible white cast; nano (<100 nm) eliminates cast but raises nanoparticle-penetration concerns (data generally reassuring for intact skin).