The gel nail TPO ban explained: what changes for your manicure in Great Britain

What has actually been banned

Gel manicures, builder gel (BIAB) and other UV-cured treatments remain legal in Great Britain. The restriction applies to a single ingredient, trimethylbenzoyl diphenylphosphine oxide, known as TPO, which is a photoinitiator that absorbs UV or LED light to start the curing process that hardens liquid gel into a solid, glossy surface. Products reformulated without TPO are unaffected and continue to be sold and used normally.

Despite headlines about a 'gel nail ban', the change targets one chemical, not the treatment itself. TPO is used in many gel polishes, builder gels and top coats to trigger the hardening reaction when exposed to light. The restriction means that from the specified dates, cosmetics containing TPO cannot be placed on the market in Great Britain, but any gel product that does not list TPO as an ingredient remains fully compliant.

For consumers and professionals, the practical effect is that the range of available gel products will shift to TPO-free formulations. Brands have been reformulating to meet the new rules, and these alternative products are already in use in many salons.

The dates that matter

From 15 August 2026, manufacturers and importers can no longer newly place cosmetic products containing TPO on the Great Britain market. Existing compliant stock already in the supply chain can continue to be sold until the off-shelf deadline of 14 February 2027, after which TPO-containing products can no longer be made available at all. This staged approach differs from the EU, where TPO has been banned since 1 September 2025 with no continued professional use of old stock.

The two-date structure gives the industry time to use up existing inventory before the final sales ban. The first date stops new supply entering the market, while the second date removes remaining stock from shelves. This is intended to minimise waste and disruption for salons and retailers.

In Northern Ireland, the situation is different. The region follows EU rules, so TPO-containing products have not been available for purchase since 1 September 2025. Professionals in Northern Ireland have already had to switch to TPO-free alternatives.

Why TPO was restricted

TPO was classified as a Category 1B reproductive toxicant under chemical safety rules, which triggered its restriction in cosmetics. In Great Britain the ban came through the UK Cosmetics Regulation, via a Statutory Instrument published by the Office for Product Safety and Standards (OPSS) in January 2026. Industry body the CTPA describes the change as a precaution based on the chemical's hazard classification and a worst-case exposure assessment, not proof that past manicures caused harm.

The classification means that TPO is presumed to have the potential to cause adverse effects on fertility or the unborn child, based on animal studies. This hazard classification, combined with an assessment of potential exposure during use, led regulators to conclude that the ingredient should no longer be used in cosmetic products.

A 2014 EU scientific committee had previously found TPO safe as a nail product at up to 5 percent concentration, but also noted it was a moderate skin sensitiser. The reclassification of the chemical's hazard profile is what drove the new restriction, rather than new evidence of harm from actual manicure use.

What it means for salons and technicians

In Great Britain, the CTPA's interpretation, developed with Trading Standards, is that professionals may continue to use existing compliant TPO stock, unlike in the EU. Salons should check their gels, builder gels and top coats for TPO and plan to move to reformulated products before the February 2027 off-shelf date. Reputable brands began reformulating after the 2025 EU ban, so many professional products are already TPO-free.

Salon owners and technicians should audit their current product inventory to identify any items containing TPO. The ingredient will be listed on the product label or packaging as 'trimethylbenzoyl diphenylphosphine oxide'. Products that contain it can be used legally until the off-shelf deadline, but should not be reordered after August 2026.

Many professional brands have already updated their formulations to remove TPO, often replacing it with alternative photoinitiators such as TPO-L or BAPO. These alternatives perform the same function and are compliant with the new regulations. Salons that have not yet switched should contact their suppliers to confirm which products are TPO-free.

What customers should do

There is no need to avoid gel manicures; ask your salon whether they use TPO-free formulations if you are concerned. You can check any product yourself by reading the ingredient list for 'trimethylbenzoyl diphenylphosphine oxide'. The classification relates chiefly to a worst-case and occupational exposure picture; the direct link between occasional consumer use and harm has not been established. Anyone with specific health concerns, including during pregnancy, should speak to a healthcare professional rather than rely on general reporting.

For most customers, the ban will have no visible effect on their manicure experience. Gel polish, builder gel and other UV-cured treatments will continue to be offered, and the cured result will look and perform the same as before. The only change is that the chemical composition of the products will be different.

If you want to know what is being used on your nails, the simplest step is to ask your technician. Salons should be able to tell you whether their products are TPO-free and may be able to show you the ingredient list. This information is also available on the packaging of retail products sold for home use.

For individuals who are pregnant, planning a pregnancy, or have other health concerns, it is reasonable to seek advice from a healthcare professional. They can provide guidance based on your personal circumstances, rather than relying on general media coverage of the ban.

Frequently asked questions

Are gel manicures banned in the UK?

No. Gel manicures, BIAB and UV-cured treatments remain legal. Only the ingredient TPO is restricted, and TPO-free gels continue to be sold and used.

What is TPO?

Trimethylbenzoyl diphenylphosphine oxide, a photoinitiator that helps gel nail products cure and harden under UV or LED light. It was classified as a Category 1B reproductive toxicant.

When do the TPO rules take effect?

From 15 August 2026 TPO products cannot be newly placed on the Great Britain market. From 14 February 2027 they can no longer be sold at all.

Can salons still use up their old stock?

In Great Britain, the CTPA's interpretation is that professionals may use existing compliant TPO stock until the February 2027 off-shelf deadline. In the EU and Northern Ireland they cannot.

How do I know if a product contains TPO?

Check the ingredient list for 'trimethylbenzoyl diphenylphosphine oxide', or ask the manufacturer or your salon. Compliant alternatives include TPO-L and BAPO.