Also known as Mineral sunscreen filters, Inorganic UV filters, ZnO and TiO2
Two mineral sunscreen actives that absorb UV energy at the skin’s surface, with zinc reaching farther into long-wave UVA than titanium dioxide.
Sunscreen active ingredients
What it is
Zinc oxide and titanium dioxide are particulate ultraviolet filters used as active ingredients in mineral sunscreens. They protect mainly by absorbing UV energy, not by simply reflecting it like a mirror. Zinc oxide covers UVB and a wider span of UVA, while titanium dioxide is strongest through UVB and shorter UVA wavelengths. Particle size, surface coatings, dispersion, and the rest of the sunscreen system affect both protection and cosmetic finish.
Common uses and benefits
These filters can provide photostable UV protection in lotions, creams, sticks, powders, and sprays. Zinc oxide is especially useful for long-wave UVA coverage, while titanium dioxide can add strong shorter-wavelength protection and opacity. Seeing either ingredient—or its percentage—does not tell you the finished SPF or broad-spectrum performance. Only the labeled, tested sunscreen formula establishes those claims.
Who may like it
They may appeal to anyone who prefers a mineral-filter sunscreen, including people looking for photostable protection. Comfort, white cast, tint, dryness, and suitability for sensitive or blemish-prone skin vary widely by formula rather than by the word “mineral.”
Common formats
Zinc oxide
Titanium dioxide
Coated or uncoated mineral particles
Nano or non-nano dispersions
Tinted mineral sunscreens with iron oxides
Mineral and hybrid sunscreen systems
Pairing and use notes
Formulators may combine zinc oxide and titanium dioxide with each other, other permitted sunscreen filters, iron oxides, antioxidants, humectants, and emollients. Choose a broad-spectrum sunscreen with an appropriate SPF, apply it evenly and generously, and follow the label for timing, water resistance, and reapplication.
Good to know
Mineral filters can leave a white cast, collect in texture, pill, or feel drying depending on the dispersion and base. Avoid inhaling airborne sunscreen powders or mists and follow all label directions. Do not estimate protection from the ingredient list, use loose mineral powder as your only sun protection, or assume makeup containing a filter provides adequate coverage without a labeled SPF and broad-spectrum claim.
Sources and references
U.S. Food and Drug Administration, current consumer guidance on sunscreen actives, SPF, and broad-spectrum labeling — View source
Pinnell et al. (2000), comparative study of microfine zinc oxide and titanium dioxide on human skin — View source
2016 optical study showing metal-oxide sunscreens protect mainly through UV absorption — View source
