Gel Nail Polish Safety: UV Lights and Banned Chemicals Explained
This article investigates the safety of gel nail polish, focusing on UV-drying lamps and the chemical trimethylbenzoyl diphenylphosphine oxide (TPO). While studies suggest a low, non-zero risk of skin cancer from UV lamps, experts advise moderation and sunscreen for frequent users. TPO, banned in the EU due to animal studies showing toxicity when ingested in large amounts, is considered safe in the U.S. for typical manicure exposure. The chemical is consumed during curing, minimizing human contact. Regulatory differences between the EU and U.S. are highlighted, with recommendations for informed use.
The safety of gel nail polish raises two primary concerns: the UV-drying lamps and the ingredient trimethylbenzoyl diphenylphosphine oxide (TPO). Regarding UV lamps, current evidence indicates a low, but not zero, risk of skin cancer. Several studies, including those from MD Anderson Cancer Center and various dermatological journals, have explored this. While some research linked hand skin cancers to UV lamps, others found that UV-A exposure from single visits wasn't enough to cause DNA damage, and overall cancer risk remains low. However, a 2023 study showed UV dryers can damage DNA in lab cells. A 2024 study equated one manicure's UV dose to 3-6 minutes of summer sun. The American Academy of Dermatology recommends moderation, suggesting gel nails for special occasions and advising fingerless gloves or sunscreen to mitigate potential risks like skin aging and cancer, especially for individuals on photosensitizing medications.The chemical TPO, a photoinitiator crucial for curing gel polish, was banned in the European Union after animal studies classified it as a 'reproductive toxicant' when ingested in large amounts. However, TPO is not banned in the U.S., where regulatory bodies consider real-world human exposure levels. Experts explain that during a manicure, TPO is present in small amounts, is not well absorbed through the nailbed, and is consumed in a chemical reaction during curing, meaning it’s not present on the nail for weeks. The regulatory divergence stems from the EU's hazard-based approach versus the U.S.'s risk-based assessment. Consumers can find TPO-free polishes and are advised to check ingredient lists and avoid direct skin application to ensure safe use.
