TPO Over as UK Bans Gel Nail Products Over Health Concerns.

TPO Over as UK Bans Gel Nail Products Over Health Concerns

The United Kingdom has banned the use of Trimethylbenzoyl Diphenylphosphine Oxide (TPO) in new cosmetic products, affecting some gel nail polishes and other UV-cured nail products sold across Great Britain.

The regulation came into effect on August 15, 2026 after concerns over the chemical's potential reproductive health effects led regulators to restrict its use in cosmetics. The European Union introduced a similar ban in September 2025.

TPO is a photoinitiator, meaning it helps gel polish harden when exposed to UV or LED light. It has been widely used in gel nail formulations because it allows the polish to cure and form the durable, glossy finish associated with gel manicures.

The new rules do not mean that gel manicures have been banned in Britain.

Instead, manufacturers and importers can no longer place new cosmetic products containing TPO on the Great Britain market. Existing products can continue through the supply chain during the transition period, with February 14, 2027 set as the next major deadline for distributors and retailers to stop making TPO-containing products available.

The health concerns behind the restriction stem from TPO's classification as a substance associated with reproductive toxicity. European regulators classified it under rules covering substances that may pose risks to reproductive health, prompting the EU's 2025 cosmetics ban.

The scientific and industry debate, however, is more complicated than the headlines suggest.

The Cosmetic, Toiletry and Perfumery Association has argued that the classification is based largely on studies involving high levels of exposure, including animal studies involving oral consumption, rather than the much lower exposure expected from the normal use of gel nail products.

The industry body has therefore questioned whether the risks identified in those studies accurately represent the level of exposure experienced by people receiving gel manicures.

Regulators have nevertheless moved ahead with the restriction under Britain's cosmetics framework.

For nail technicians and salons, the immediate effect is a change in the products they can purchase and use. Many manufacturers have already reformulated their gel systems without TPO, following the European Union's earlier ban and the UK's decision to introduce its own restrictions.

The change also highlights the different regulatory systems operating in Britain and the European Union since Brexit.

Northern Ireland follows EU cosmetics regulations, meaning TPO has already been prohibited there since the EU restriction took effect in September 2025. The new rules introduced this month apply to England, Scotland and Wales, which make up Great Britain.

For consumers, there is therefore no need to stop getting gel manicures altogether.

The main change is the ingredient used in the product.

Salons are expected to move towards TPO-free alternatives, while customers can ask technicians whether the products being used are TPO-free. The transition is already underway, with manufacturers developing replacement formulations designed to provide the same curing and durability properties.

The UK restriction brings Britain closer to the European approach to TPO, but it is also likely to keep the debate around cosmetic chemical regulation alive.

For regulators, the issue is whether a substance with potentially serious effects under certain exposure conditions should remain in consumer products.

For the nail industry, the question is whether those risks accurately reflect the much smaller exposure associated with professional use.

For customers, the practical answer is simpler: gel nails are still available in the UK, but TPO is on its way out.