Sunscreen without a white cast for deep skin tones

Why does sunscreen look white or grey?

Mineral sunscreens use zinc oxide, titanium dioxide or both. Formulas containing these filters can leave a white cast and feel heavy, making them harder to wear consistently. Conventional zinc oxide particles tend to clump together and scatter visible light, producing a white or grey residue that is especially noticeable on darker skin. The problem is not simply whether a sunscreen contains zinc oxide: how the particles behave inside the finished formula matters too.134

Match the tint, not just the SPF

Choose the shade using both your skin tone and your undertone, the underlying hue that affects your skin's appearance. A shade called "universal" still needs to match your skin tone and undertone, because the name is not a colour match. For deep skin, finding a suitable tint is part of choosing the sunscreen, not an optional finishing touch. Check the complete ingredient list for iron oxides, which are listed as inactive ingredients even though they add protection against visible light and UVA radiation.2

An invisible finish and visible light protection are different things. Ordinary broad spectrum sunscreen addresses ultraviolet rays, but visible light can cause persistent skin darkening in deeper skin tones and worsen existing hyperpigmentation, meaning dark patches. Tinted sunscreen containing iron oxide, or less commonly pigmentary titanium dioxide, helps address that extra exposure while reducing the ashy appearance. If dark spots are a priority, do not choose solely by how transparent a sunscreen looks.5

Do you have to use mineral sunscreen?

No. Chemical, mineral and hybrid sunscreens can all protect effectively when they meet the same protection requirements. A hybrid combines chemical and mineral filters. For sensitive skin, dermatologists recommend mineral sunscreen, so a matching tinted mineral formula is a useful option to try. For texture, creams suit dry skin and facial use; gels suit oily complexions and hairy areas.1

Try a small size before buying a full bottle

Finding a sunscreen you want to wear can take trial and error. Start with a sample or small size when available, because a full bottle is an unnecessarily large audition. Judge the shade and finish with generous coverage rather than making a chalky sunscreen disappear by using less. The protection on the label depends on applying enough product. Check the expiration date before buying, and store sunscreen somewhere cool and dark rather than in a hot car.5

How to apply your sunscreen

1. 1Apply to dry skin 15 minutes before going outdoors, every day you will be outside.
2. 2Use at least 1 teaspoon for your face. Most adults need about 1 ounce to cover all skin not covered by clothing.
3. 3Cover exposed areas, including your neck, ears, tops of your feet and exposed scalp.
4. 4Reapply approximately every two hours outdoors, and after swimming or sweating, following the bottle's directions.

Can untinted mineral sunscreen become less chalky?

New approaches are being developed. Zinc oxide shaped into microscopic four armed structures produced a warmer appearance and less white cast in laboratory tests and controlled skin applications, without added pigments. Those formulations still need further testing before reaching the market. Sunscreen development also includes filters such as bemotrizinol that give formulators more options for transparent finishes and lighter textures. For shopping now, choose by the finished sunscreen's shade and feel rather than expecting one filter name to settle the question.34