Titanium dioxide is an inorganic mineral UV filter that protects skin by reflecting and scattering ultraviolet radiation, primarily UVB and short UVA. It is widely used in sunscreens and color cosmetics and is also valued as a white pigment and opacifier.
| Reported effect | How often | Notes |
|---|---|---|
| White cast on skin | Common | Cosmetic effect from the opaque mineral, more pronounced on darker skin tones; reduced in micronized formulations. |
| Skin dryness or occlusive feel | Uncommon | Can occur with high mineral concentrations or certain formulation bases. |
| Allergic contact dermatitis | Rare | Titanium dioxide itself is generally considered non-sensitizing; reactions are usually attributed to other formulation components. |
| Irritation or stinging | Rare | Typically related to other excipients rather than the mineral filter itself. |
| Concerns over nanoparticle penetration/inhalation | Very rare | Topical studies show negligible penetration of intact skin; inhalation concerns relate mainly to loose powder/spray forms, not applied lotions. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.