UCLA scientists develop mineral sunscreen without the chalky white cast

UCLA scientists have created a mineral sunscreen formula that leaves far less of the pale, chalky residue that often discourages people from using sun protection every day.

Dermatologists have long recommended daily sunscreen use to reduce exposure to ultraviolet radiation. Too much ultraviolet radiation is the leading preventable cause of skin cancer, which is the most common cancer in the United States.

Despite those risks, many people do not apply sunscreen regularly. One common complaint is that mineral sunscreens containing zinc oxide can leave a noticeable white or gray film on the skin.

Reshaping Zinc Oxide To Reduce White Cast

A study led by researchers at the UCLA Health Jonsson Comprehensive Cancer Center suggests that the problem could be addressed without creating an entirely new chemical ingredient. Instead, the researchers changed the physical shape of the zinc oxide particles already used in many mineral sunscreens.