Revolutionary Breakthrough by UCLA Scientists: The Solution to Sunscreen’s White Cast Problem
One of the most common complaints about mineral sunscreens — the stubborn white, chalky residue they leave on the skin — may finally have a solution. This breakthrough is all thanks to the researchers at UCLA Health’s Jonsson Comprehensive Cancer Center. These scientists have ingeniously engineered a new shape of zinc oxide particles that significantly reduces the dreaded white cast while maintaining robust UV protection.
Breaking away from the conventional near-spherical nanoparticles used in most sunscreens, the UCLA team developed microscopic four-armed structures called tetrapods. These were produced through a patented high-temperature flame process. The unique geometry of these tetrapod particles allows them to form porous networks instead of clumping together. This clumping is the main cause of light scattering and the visible white cast on the skin.
The innovative SPF 30 formula was shown to appear warmer and closer to natural skin tones in laboratory and controlled skin application tests. This is a particularly significant advance for people with darker skin tones. These individuals are disproportionately discouraged from wearing mineral sunscreens. The findings, published in ACS Materials Letters, could have major implications for skin cancer prevention. This is by encouraging more consistent, daily sunscreen use across all skin tones. This groundbreaking research was featured on ScienceDaily as recently as July 19, 2026.
Source: ScienceDaily – UCLA Scientists Develop Mineral Sunscreen Without the Chalky White Cast