Zinc Oxide vs Titanium Dioxide
Zinc Oxide vs Titanium Dioxide — the two mineral (physical) UV filters used in sunscreens, which work by sitting on the skin to scatter and absorb ultraviolet light. Zinc oxide offers broad protection across UVA and UVB wavelengths, while titanium dioxide is particularly strong against UVB and shorter UVA but covers less of the long UVA range.
Key points
- Zinc oxide provides broader UVA coverage, making it valuable for guarding against longer-wavelength aging rays.
- Titanium dioxide is highly effective against UVB and can feel less heavy, but on its own it covers less of the long UVA spectrum.
- Both are generally well tolerated and are common choices for sensitive or reactive skin.
- Many mineral sunscreens combine the two filters to achieve balanced, broad-spectrum protection.
Frequently asked
Which mineral sunscreen filter is better?
Zinc oxide offers broader UVA protection, while titanium dioxide is very effective against UVB, so many products combine them for balanced coverage. Both are gentle options often recommended for sensitive skin.
Do mineral sunscreens leave a white cast?
They can, since zinc oxide and titanium dioxide are white and sit on the skin's surface. Micronized or tinted formulas help reduce the white cast on a range of skin tones.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
