Does a Beard Protect Your Skin From the Sun? What the Research Shows
Does a beard work like a built-in sunscreen? Research from Australia found that facial hair does block some ultraviolet (UV) radiation, but the protection is modest, uneven and shrinks as the sun climbs higher, so a beard is not a substitute for sunscreen on the skin around and beneath it.
It is a popular idea, and a tempting one. If a full beard already covers the lower half of your face, it seems reasonable to assume your skin is shaded. The science is more nuanced.
What the research actually tested
The study most often cited on this topic came from a team led by Alfio Parisi, a professor of radiation physics at the University of Southern Queensland in Australia. As reported by NBC News, the researchers used mannequin heads fitted with UV sensors at five sites on the lower face: the upper lip, upper jaw, middle jaw, lower jaw and chin. One head had a longer beard, one a shorter beard, and one was clean-shaven as a control.
In the published paper, the team describes using polysulphone film to measure erythemal UV, which is the portion of sunlight that causes sunburn. The heads were mounted on a rotating platform outdoors, and readings were compared against bare-skin sites at different positions of the sun in the sky.
What the numbers mean
The paper reports that facial hair reduced sunburn-causing UV exposure to roughly one third of what bare skin received, and that its ultraviolet protection factor (UPF) ranged from 2 to 21. UPF works like the SPF number on a sunscreen bottle: a higher number means more UV is blocked. A UPF of 2 blocks about half of the UV, while a UPF of 21 blocks most of it.
In the NBC News report, Parisi described this as a reduction in UV of 50 to 95 percent, depending on the length and density of the facial hair, the angle of the sun and the part of the face. The same article notes that sunscreen is typically about SPF 30, which puts even the best beard result below the level dermatologists suggest for sunscreen.
The pattern across the results is worth remembering:
Longer facial hair gave more protection when the sun was low in the sky, but that advantage shrank as the sun rose higher.
At higher sun angles, the paper reports average UPF values under 10, and in some cases under 5.
The upper lip received the most UV exposure of the sites measured, according to the news report.
What the study cannot tell us
Every study has limits, and this one is open about them. The measurements used mannequin heads rather than people, so they cannot capture how real beards shift with movement, wind or product use. The beards used were dark brown, and the work was carried out at a single subtropical site in Toowoomba, Australia, with a small number of partly cloudy readings.
The paper's own conclusion is that facial hair provides protection that is "not very high," and its authors state that facial hair should not be taken as a reason to spend extended periods of time in sunlight. The study also did not measure skin cancer rates or sunburn in real beard wearers. What it shows is how much UV reaches a sensor, not what happens to a person's skin over years. The American Cancer Society's Dr. Len Lichtenfeld, quoted in the NBC report, said the research does not show that facial hair offers significant benefit.
A beard only covers the skin directly beneath it. The ears, the nose, the tops of the cheeks, the lips and the back of the neck are all outside the shade a beard can offer. Thinner or patchier areas give less coverage than dense ones, since the study found protection depended on length and density. The upper lip, where the measurements recorded the highest exposure, is a good example.
What dermatologists recommend instead
The American Academy of Dermatology's sunscreen guidance does not single out beards, so its general advice applies to everyone with exposed skin. It recommends:
Choose a sunscreen with an SPF of 30 or higher that is water resistant and broad-spectrum, meaning it covers both UVA and UVB rays.
Use about 1 ounce, roughly a shot glass, for skin not covered by clothing, and at least 1 teaspoon for the face.
Reapply every two hours, and immediately after swimming or sweating.
Apply about 15 minutes before going outdoors.
If you have a thick beard, a gel or lighter lotion formulation may be easier to work through the hair to reach the skin. For skin that changes, a spot that looks new or unusual, or any worry about sun damage, a dermatologist is the right person to ask.
Caring for the beard itself
Beard care and sun care are separate jobs. Grooming products condition and shape the hair; they are not a replacement for sunscreen. If you are building a daily routine for your beard, two products from our shop are worth a look.
For everyday conditioning, see The Royal Standard Beard Oil.
If you prefer a complete set, take a look at The Royal Standard Beard Bundle.
The takeaway
Your beard casts a little shade, and the research confirms it. But the measured protection is partial, changes through the day, and leaves several areas of the face uncovered. Think of your beard as a bonus, not a plan, and keep sunscreen, shade and a hat in your routine.
Sources
Parisi AV, Turnbull DJ, Downs N, Smith D. Dosimetric Investigation of the Solar Erythemal UV Radiation Protection Provided by Beards and Moustaches
American Academy of Dermatology: How to apply sunscreen
This article is for educational purposes only and is not medical advice. It is not intended to diagnose, treat, cure or prevent any condition. Talk with a qualified healthcare provider about skin or scalp concerns.
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