Are UV and LED nail lamps safe? What the research actually says

Every gel manicure ends under a lamp, and in 2023 a laboratory study on cells made headlines suggesting those lamps might cause cancer. Clients have asked about it ever since. The honest picture is more reassuring than the headlines, but not a reason to ignore the lamp either.

The short answer: studies that measured real nail lamps put the added skin-cancer risk as small, and reviews since have mostly agreed. The lamps do emit UVA, though, and the American Academy of Dermatology recommends broad-spectrum SPF 30+ sunscreen or dark fingerless gloves at every gel appointment. Those two habits lower an already small exposure further.

What nail lamps emit

Gel cures when light-sensitive ingredients in it react to ultraviolet A (UVA) light. Older “UV” lamps and newer LED lamps both emit UVA, so “LED” does not mean “UV-free”. The American Academy of Dermatology prefers LED lamps because they emit less UV, and still recommends protecting your skin.

The 2023 study that made headlines

Researchers exposed human and mouse cells in the laboratory to light from a UV nail dryer. They found DNA damage and mutations in the cells, published in Nature Communications in 2023. It was a careful study, and a worrying one to read about.

Its limits matter, though. The experiments were on cells in dishes, not on people’s hands, and the authors themselves wrote that epidemiological studies, following real people over time, are needed before anything can be concluded about cancer risk.

What studies of real lamps found

• Measuring the dose (2014). Researchers measured the UVA output of 17 nail lamps. Even with many exposures, they estimated the risk of skin cancer to be small, and recommended sunscreen or UVA-protective gloves anyway.
• A 2019 review in Clinical and Experimental Dermatology judged the risk negligible, and noted that sunscreen lowers it further.
• A 2025 scoping review of 17 papers, five of them case reports, found lamps mostly within safety limits when used correctly, though some exposures exceeded them.
• A 2025 letter in the International Journal of Dermatology found no significant skin-cancer risk.

What regulators and dermatologists say

Source	What it says
FDA (2017)	Views nail curing lamps as low risk when used as directed, and had no reports of burns or skin cancer. Suggests SPF 15 or higher.
FDA	Some antibiotics, oral contraceptives, estrogens and St. John’s wort increase sensitivity to UV.
American Academy of Dermatology	Recommends broad-spectrum, water-resistant SPF 30+ or dark, opaque fingerless gloves, and prefers LED lamps.
American Academy of Dermatology	Also states that repeated gel manicures can increase the risk of skin cancer and photo-aging.

That last point is more cautious than the exposure studies above, and it is worth taking seriously rather than arguing with. The dose from one appointment is small; a gel manicure every two or three weeks for years adds up. Protection costs almost nothing.

How to lower your exposure

1. Sunscreen or gloves. Apply a broad-spectrum, water-resistant SPF 30+ to the backs of your hands and fingers before your appointment, or wear dark fingerless gloves while the gel cures.
2. Check your medicines. If you take one that makes your skin light-sensitive, ask your doctor, and use gloves.
3. Keep curing to what the gel needs. A lamp matched to the gel, with the maker’s cure times, cures properly without extra exposure. Proper curing also matters for allergy, because under-cured gel is a known risk factor.
4. Take breaks. The American Academy of Dermatology suggests going without polish for a week or two now and then, which also gives your nails a rest.
5. Consider a lamp-free finish. A natural manicure, or regular polish, needs no lamp at all.

Where this leaves you

For most people, the evidence says a gel manicure’s lamp adds a small UV dose, and two easy habits make it smaller. It does not say the lamp is harmless, and no honest salon should promise “zero risk” or a “UV-free” lamp. If you have a history of skin cancer, a light-sensitive condition, or you simply prefer not to, a lamp-free manicure is a perfectly good choice.

At Melix, you are welcome to wear sunscreen or fingerless UV gloves during your appointment, and a natural Russian manicure with no gel needs no lamp. If you have questions about your own skin, ask your dermatologist. For the other health question about gel, allergy, see Gel nail allergy, explained.