The European Union has officially banned the use of trimethylbenzoyl diphenylphosphine oxide, commonly known as TPO, in gel nail polishes starting September 1, 2025. The chemical is used as a photoinitiator that hardens gel polish under UV and LED light. Following studies that linked it to possible reproductive harm and toxicity in animal testing, regulators classified it as a high concern substance and removed it from all cosmetic products within the EU.
This decision means salons and beauty suppliers across Europe are no longer allowed to sell or apply gel products containing TPO. Brands that operate internationally will need to reformulate their products to stay compliant with European standards. While the ban is based on precautionary principles, it may influence the global beauty market as many manufacturers adjust their supply chains and formulas for consistency across regions.
In the United States and other markets outside the EU, TPO remains approved for use. However, because manufacturers often streamline production, experts suggest that reformulated TPO free versions of popular brands may soon become standard worldwide. Already, some nail care companies have introduced alternatives, with brands such as OPI, Aprés Nails, and Manucurist offering TPO free options.
For consumers, the ban does not mean gel manicures are disappearing. Instead, it signals a shift toward newer formulas that provide the same long lasting results without the use of the restricted chemical. Nail technicians and salons are expected to transition quickly as fresh product lines roll out, ensuring that gel manicures remain available while aligning with the updated regulations.