Revolutionizing Sunscreen: UCLA’s Innovative Formula Eliminates White Residue
For millions of people worldwide, the chalky film left by mineral sunscreens is a common concern. However, a groundbreaking development from the UCLA Health Jonsson Comprehensive Cancer Center promises to change the game. The scientists have crafted a new form of zinc oxide—shaped like microscopic four-armed structures known as tetrapods. This innovative design offers robust SPF 30 UV protection while significantly reducing the white residue on the skin.
Unlike traditional zinc oxide nanoparticles that clump together and scatter visible light (resulting in an undesired gray or white cast), these tetrapod-shaped particles disperse more evenly. They produce a warmer tone that closely matches natural skin tones in laboratory tests and controlled skin applications. This breakthrough is particularly noteworthy for individuals with darker skin tones, who have often been dissuaded from using mineral sunscreens due to this cosmetic issue.
Lead researcher AJ Addae, a UCLA chemical biology doctoral candidate, highlighted that since zinc oxide is already an FDA-approved ingredient, this shape-based redesign bypasses the usual decade-long wait for new sun filters. The tetrapod formula also eliminates the need for a solvent, making it a more eco-friendly option. The findings were published in the journal ACS Materials Letters.
Source: ScienceDaily — UCLA Scientists Develop Mineral Sunscreen Without the Chalky White Cast