Ingredients Glossary / T

Titanium Dioxide

A white mineral UV filter, strongest against UVB, that is also used as a white pigment in creams and makeup.

titanium dioxide, CI 77891, TiO2, micronised titanium dioxide, titanium dioxide [nano]

Sun protection · Sensitive skin

    What it does

    Titanium dioxide is a white mineral compound that works as a UV filter, strongest against UVB and shorter UVA rays, as well as a white pigment in skincare and beauty products. It is a common mineral sunscreen filter and, when used correctly, helps protect against the signs of ageing caused by sun exposure. In many creams and most makeup it is there as a white pigment rather than as sun protection, so rely only on products labelled with an SPF.

    How it works

    In sunscreens, titanium dioxide particles sit on the skin's surface, where they absorb most UV and scatter or reflect some of it. Because it is weaker against long UVA rays, it is usually paired with zinc oxide or organic filters for broad-spectrum protection. Finer, micronised particles look far less white on the skin, and regulators' safety reviews have found they are unlikely to penetrate beyond the skin's outer layer.

    MG says

    Titanium dioxide is a gentle, effective alternative for those who cannot or do not wish to use organic (chemical) filters, and it's one of the two mineral filters I recommend for sensitive skin and during pregnancy. It is less effective than zinc oxide against long UVA rays, so choose a broad-spectrum formula, ideally one that pairs the two.

    Cautions

    Titanium dioxide rarely irritates, though some formulas leave a white cast on deeper skin tones. Avoid inhaling loose powders and sprays that contain it; for the face, spray sunscreen into your hands first. As with any sunscreen, reapply regularly, especially after swimming, sweating or towelling.

    Regional notes

    Australia: Sunscreens whose main purpose is sun protection, and moisturisers with SPF above 15, are therapeutic goods (look for AUST L on the pack), while tinted bases and foundations with SPF can be cosmetics.

    United States: US sunscreens are over-the-counter drugs, and titanium dioxide is one of only two filters the FDA's 2021 proposed order found generally recognised as safe and effective.

    United Kingdom: In sunscreens, nano titanium dioxide must be labelled “(nano)” in the ingredient list and may not be used in sprays that could be inhaled; the same applies in the EU.