Does dark skin need sunscreen?

What melanin does, and what it does not

The old saying that dark skin does not burn has a real basis. In 1979, Kaidbey and colleagues measured how much ultraviolet light passed through skin samples from Black and white donors. About five times as much UVA and UVB reached the upper dermis of white skin. They described melanin as a filter that cuts light across wavelengths, helped by the way pigment is packed in darker skin.

A filter is not a shield. The AAD says that the sun can speed up how quickly brown and black skin ages, and that its visible light can cause hyperpigmentation, skin turning darker than its natural tone.

Visible light: the part most sunscreens miss

Sunscreen labels talk about UVA and UVB. Visible light is the light you can see, and for deeper skin it matters. In a 2010 study in the Journal of Investigative Dermatology, Mahmoud and colleagues exposed 20 volunteers with skin types IV to VI to visible light and to long-wave UVA. Both darkened the skin, and the pigment from visible light was darker and lasted longer. Volunteers with fair, type II skin did not darken at all.

That is why dermatologists point people with melanin-rich skin to tinted sunscreen. The Skin of Color Society explains that tints use iron oxides to protect against visible light, which is useful for melasma and dark marks. The Society also notes that sunlight can make post-inflammatory marks darker, so a fading routine without sun protection works against itself.

Skin cancer: less common, found later

Skin cancer is not limited to light skin. The AAD says that when people with darker skin tones get it, it is often advanced by the time it is diagnosed. A 2016 study in the Journal of the American Academy of Dermatology looked at 96,953 melanoma patients in the national SEER database from 1992 to 2009. Black patients had the lowest survival of any group, and a larger share of them were diagnosed at later stages.

Sunscreen is only half of the answer here. The AAD notes that in darker skin, skin cancer may appear where the sun rarely reaches: the palms, the soles, under the nails, inside the mouth and in the groin. Checking those places is part of sun care too.

What to look for on the label

Why the right tint is hard to find

It is not your imagination. A 2023 study in Cureus reviewed 410 sunscreens sold at accessible prices. Only 2 offered shade matching, and only 8 listed iron oxides. The authors called it a clear gap in the market for people with skin of color.

Mineral sunscreens use zinc oxide or titanium dioxide, which reflect UV and can leave a white film. The Skin of Color Society says newer formulas use smaller particles that look less white on darker skin. Chemical sunscreens absorb UV and turn it into heat instead. If your tint is a little off, the Society suggests foundation and bronzer over it.

How much, and how often

1. 1Face and neck: half a teaspoonThe Skin of Color Society's measure to cover the face and neck.
2. 2Whole body: about one ounceRoughly a shot glass, for a beach day or a pool afternoon.
3. 3Every 2 hours outdoorsWhatever the SPF. Reapply right after swimming or sweating too, even with a water-resistant formula.
4. 4Shade and clothing countThe Skin of Color Society suggests sun-protective clothing over dark marks, alongside sunscreen.

In Brevard, and at the studio

On the Space Coast, sun protection is a year-round habit, and the Florida skin care guide sets out the UV numbers and a daily routine. If you are working on dark marks or melasma, sunscreen decides whether the rest of your plan works.

At Karisma Esthetics, Kay Woodson's own pick for clients after a facial is an SPF 37, which clears the AAD's SPF 30 floor with room to spare. Bring the sunscreen you use now to your next visit (all facials in Melbourne, FL are listed here) and she can tell you whether it fits your skin. Any exfoliating facial, like the $225 Advanced Facial, makes daily sunscreen even more important in the weeks after.