Although the effects of ultraviolet rays (UV) on the skin have been studied for years, a new discovery has shed light on the LED lamps used for drying nail polish.
The CONICET researcher María Laura Dántola, from the Institute of Theoretical and Applied Physicochemical Research (INIFTA, CONICET-UNLP), began investigating the topic four years ago, noticing the widespread use of semipermanent nail polish among her university students.
The procedure, carried out at home with visible LED UV devices, allows for quick drying, but its weekly use at maximum power raised concerns about possible risks to skin health.
Chemical modifications in skin molecules
In the research published in Chemical Research in Toxicology, scientists found that modern lamps, although less harmful than early versions of UVA radiation, still produce chemical changes in skin molecules.
“After four minutes of exposure, typical of a manicure session, we observed modifications that affect the skin’s biological functions,” explained Mariana Serrano, another researcher at CONICET in INIFTA.
Medical consequences and possible long-term damage from ultraviolet rays
The study revealed that photosensitized processes generated by LED radiation can cause:
- Photoallergy or phototoxicity, causing irritation and hypersensitivity.
- Alterations in tyrosinase, the enzyme responsible for melanin production, reducing natural protection against the sun.
- Damage to lipids and proteins, comparable to those caused by intense solar radiation.
Lack of regulation and lack of consumer information
Researchers warn about the indiscriminate use of these devices, without controls or regulations that require manufacturers to inform about the risks of frequent exposure.
“It is essential that these products include warnings about their harmful effects and preventive recommendations such as the use of sunscreen or gloves,” the scientists pointed out.
Towards accessible knowledge for society
Although the study is part of basic science, its results can guide future applied research on the impact of radiation on different skin layers.
The goal is for the generated information to improve quality of life, enabling people to make informed decisions about the use of nail drying lamps.
