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Nail Salons' Drying Lamps Carry Small Cancer Risk

Study of various lamps at 16 salons suggests low carcinogenic potential
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WebMD News from HealthDay

By EJ Mundell

HealthDay Reporter

WEDNESDAY, April 30, 2014 (HealthDay News) -- A typical salon manicure involves drying freshly painted nails under a lamp that emits ultraviolet-A (UV-A) rays -- a spectrum of light long linked to skin cancers.

But a new study suggests that the average visit to a nail salon carries little carcinogenic potential.

"Considering the low UV-A energy exposure in an average manicure visit, multiple visits would be required to reach the threshold for potential DNA damage" that might spur cancer, wrote a team reporting their findings April 30 in JAMA Dermatology.

In the study, researchers led by Dr. Lyndsay Shipp of the department of dermatology at Georgia Regents University, in Augusta, say that prior studies into the use of UV-emitting nail polish drying lamps have not had sufficient rigor to come to any reliable conclusions.

In their study, Shipp's team used high-tech meters to measure the UV-A light exposures upon hands held in various positions under 17 different types of drying lamps. The researchers conducted the study at 16 nail salons.

First of all, they said, there were "notable differences" in the amount of UV-A light emitted by the various devices, and the amount of exposure to the hands also varied depending on the positioning of the device.

Overall, a single nail polish drying session under one of the lamps would not expose a person to a potentially cancer-causing amount of UV-A light, Shipp's team said, and "even with numerous exposures, the risk for carcinogenesis remains small."

Still, they say they agree with the authors of prior studies that precautions should be taken, including the use of sunscreens on the hands or UV-A protective gloves to limit both cancer risk and premature aging of the skin.

Dr. Chris Adigun is assistant professor of dermatology at NYU Langone Medical Center in New York City. She agreed that clients should wear some form of UV protection when using salon drying lamps.

She also believes that the study has "exposed an issue that needs to be addressed -- that there is little to no regulation on the manufacturing of these nail lamps."

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