Zinc Oxide
- Effective dose
- 5–25 %
- Evidence
- 5/5· Robust
Last updated June 1, 2026
What it is
Zinc oxide is a mineral (inorganic) sunscreen filter that sits on and within the upper skin and shields it from ultraviolet light. Though long described as a physical blocker that reflects UV, current evidence shows it works primarily by absorbing UV photons across the UVB, UVA2, and UVA1 ranges, making it one of the broadest-spectrum single filters available.
Benefits
Provides broad-spectrum protection against sunburn, photoaging, and UV damage; regulatory and formulation evidence supports use at concentrations up to roughly 25%, with finished sunscreens typically formulated in the 5-25% range to reach a given SPF.
When to take it
Apply in the morning as the last step before makeup and reapply roughly every two hours of sun exposure. As a sunscreen it is itself the SPF layer, so no additional UV pairing is needed.
Side effects
Generally very well tolerated and low-irritation, making it a common choice for sensitive skin. High-concentration mineral formulas can leave a visible white cast and feel heavier on the skin.
Sources
Products containing Zinc Oxide
No products in our database contain this ingredient yet.