Are LED masks safe?

The overall picture

LED masks give off visible and near-infrared light at low power. They don't use ultraviolet, which is the part of sunlight linked to sunburn and skin cancer. An international expert consensus published in 2025 concluded that photobiomodulation is safe for adults and that red light doesn't cause DNA damage [1]. A 2024 dermatology review reached a similar view [2].

In the two recent sham-controlled mask trials, no serious side effects were reported [3] [4]. Those trials were small and short, though, and studies often report side effects poorly. "Low risk" isn't "no risk", especially for the groups below.

Who should check first

20 of the 21 masks in our directory publish a list of people who shouldn't use them. These are the warnings that appear most often:

Counted by matching each brand's own wording, so similar warnings phrased differently may be missed. Each listing shows the full list in the brand's words.

• Pregnancy: brands differ. Some say don't use; others say ask your doctor. There's little research either way.
• Medicines: some antibiotics, acne treatments and herbal remedies make skin more sensitive to light. Your pharmacist can check what you take.
• Children and teenagers: 15 masks give an age limit, ranging from "not for children 12 and under" to "not suitable for under-22s". Several allow teenagers only with adult supervision.
• Skin conditions: don't use a mask on undiagnosed spots, changing moles or broken skin. Get anything new or changing checked first.

Your eyes

The eyes are the main safety question for a device worn on the face. Bright visible light, and blue-violet light in particular, can strain or harm the eyes at high exposure [2]. Masks handle this in different ways:

• Built-in shields or seals over the eye openings (10 masks here, where the brand says so).
• Removable inserts, pads or goggles that come in the box (10 masks).
• Nothing, with the brand saying none is needed at its light levels. Even then, keep your eyes closed or follow the manual.

The standard for light-source eye and skin safety is IEC 62471, which places products in risk groups from "exempt" to "high risk". 8 masks here say they meet it, but only 1 say which risk group they fall into. It's worth asking.

Stop and get advice if you have eye pain, blurred vision or lasting after-images. If you have an eye condition, or take medicine that makes your eyes sensitive to light, ask an optometrist before using a mask.

Darker skin and blue light

People with darker skin can be more sensitive to visible light and may develop dark patches that last. In one trial, the highest red-light dose people with darker skin could tolerate was up to 50% lower than for lighter skin. Blue-violet light (about 400–440 nm) carries more risk of pigmentation at high doses [2] [5].

• 16 of 21 masks here include blue light. If you don't need a blemish setting, choose a mask where you can leave blue off.
• Start with shorter or fewer sessions and build up.
• Stop if you notice new darkening, especially if you have melasma or are prone to dark marks after spots.

Using a mask safely

• Patch test: several brands suggest running a session on your inner arm first and checking for a reaction.
• Clean, bare skin: remove make-up and avoid putting active products on just before a session unless the manual says otherwise.
• Use the timer: don't repeat sessions back to back or exceed the recommended frequency. Redness, warmth or headaches are signs to stop.
• Keep it clean: wipe the inside after each use, as the manual describes, and don't share it without cleaning.
• Not a substitute for treatment: UK masks are sold for cosmetic use. In November 2025 the MHRA said none were registered as medical devices [6]. For acne, rosacea or other conditions, see a GP or dermatologist.

Electrical and battery safety

• Charge with the cable and adapter the manual specifies, and stop using a mask with damaged wires, a swollen battery or a cracked controller.
• Check the mask is marked for sale in the UK (UKCA or CE) and that a company with a UK or EU address stands behind it. See what the labels mean.
• The safety standards a brand declares, usually in the manual, show which electrical, battery and light-safety tests it says the mask meets. Our listings show these under "Safety standards declared".

If something goes wrong

Stop using the mask, and see a pharmacist, GP or optometrist if you have a burn, a skin reaction or eye symptoms. Then report it:

• To the MHRA through the Yellow Card scheme, which takes reports of problems with medical devices [7].
• To Trading Standards through the Citizens Advice consumer service, for unsafe consumer products [8].
• To the seller and the brand, who may need to recall the product. You have statutory rights for goods that are faulty or unsafe.

Browse all 21 masks How to choose a mask

Sources

1. Evidence-based consensus on the clinical application of photobiomodulation. Maghfour J, Mineroff J, Ozog DM, Jagdeo J, Lim HW, et al. (21 panellists), Journal of the American Academy of Dermatology 2025;93(2):429–443.
2. Unlocking the Power of Light on the Skin: A Comprehensive Review on Photobiomodulation. Hernández-Bule ML, Naharro-Rodríguez J, Bacci S, Fernández-Guarino M, International Journal of Molecular Sciences 2024;25(8):4483.
3. Clinical study to evaluate the efficacy and safety of home-used LED and IRED mask for crow's feet: a multi-center, randomized, double-blind, sham-controlled study. Park SH, Park SO, Jung J-A, Medicine (Baltimore) 2025;104(7):e41596.
4. Role of photobiomodulation application frequency in facial rejuvenation: randomized, sham-controlled, double-blind, clinical trial. Bragato EF, … Fernandes KPS (10 authors), Lasers in Medical Science 2025;40(1):170.
5. Red light therapy for skin care. Harvard Health Publishing (Harvard Women's Health Watch).
6. LED mask ads banned over acne and rosacea claims. BBC News (Jennifer Meierhans).
7. Yellow Card: report a problem with a medicine or medical device. MHRA.
8. Report a product safety problem (Citizens Advice consumer service). Citizens Advice.

Directory figures are counted from our 21 UK mask listings and update as listings change. Summaries are written by Luma Index. See the research page for the full evidence library, including each study's limitations.