Phototoxic Effects on Skin Biomolecules Induced by a Domestic Nail Polish Dryer Device.

UVA radiation and visible light can lead to indirect damage to DNA, proteins, and lipids through photosensitized reactions, where a molecule undergoes a photochemical alteration by the initial absorption of radiation by another molecular entity called photosensitizer (Sens). The chemical changes undergone by biomolecules in photosensitized reactions can trigger important adverse processes such as photoallergy, phototoxicity, and skin cancer, among others. Despite the knowledge about photosensitized reactions and the fact that many endogenous compounds present in the skin can act as Sens, UVA, and visible light are widely used in several devices for domestic and general use without a thorough evaluation of their possible harmful effects; one prominent example is UV-nail polish dryers. The information in the literature about the possible damage that can be caused by using this type of radiation source is controversial. In this work, we demonstrate that the radiation dose emitted by the nail polish dryer device during a typical gel nail manicure session effectively degrades molecules present in the skin under physiological and pathological conditions. Additionally, it may induce damage to biomolecules such as proteins and lipids due to the photosensitization process, leading to the loss of their biological functions.