A broad-spectrum mineral sunscreen filter covering UVB and much of UVA.
Regulatory
Proposed by the FDA in 2019 as Generally Recognized as Safe and Effective for sunscreen use.
Feel
Can leave a white cast; particle size and formulation affect appearance.
Evidence & sources
FDA proposed zinc oxide and titanium dioxide as GRASE sunscreen ingredients. Evidence: regulatory. Known: Based on available safety and effectiveness data. Unknown: The rule had not been finalized as of the proposal. Source: US Food and Drug Administration, Sunscreen Drug Products for OTC Human Use — Proposed Rule (February 2019).