Over the weekend, a new regulation quietly reshaped the landscape of nail salons across Great Britain. Despite headlines proclaiming a sweeping "gel nail ban," the reality is more nuanced: the UK government has prohibited the use of a single chemical—trimethylbenzoyl diphenylphosphine oxide (TPO)—in new cosmetic products, citing concerns for reproductive health. The rule, which took effect on August 15, 2026, is the latest in a series of regulatory actions across Europe targeting ingredients in beauty products, and its implications are rippling through salons, manufacturers, and consumers alike.
TPO, a photoinitiator, is the unsung hero behind the glossy, durable finish of many gel manicures. It works by triggering the chemical reaction that cures gel polish under ultraviolet (UV) or LED lamps, hardening the polish to a chip-resistant shine. For years, TPO has been a staple in the nail industry, thanks to its efficiency and reliability. But mounting scientific evidence has prompted regulators to reconsider its safety profile.
According to ITV News, the ban is rooted in toxicological studies—mostly on animals—that link high levels of TPO exposure to fertility and reproductive issues. The European Union led the way by banning TPO in cosmetics from September 1, 2025, under what it described as "extreme caution." Great Britain followed suit, giving manufacturers and importers until August 15, 2026, to halt the placement of new TPO-containing products on the market. Salons, however, have been granted a transition period: they may continue using existing stock until February 14, 2027, after which all TPO-containing products must be removed from shelves.
Caroline Rainsford, Director of Science at The Cosmetic, Toiletry and Perfumery Association (CTPA), shed light on the rationale behind the ban. "The reason why TPO has been banned in cosmetic products in the EU is based on its hazardous properties, meaning how a substance might behave under a 'worst case' situation when our bodies are exposed to a very large amount," Rainsford told multiple outlets, including ITV News and Citizen Digital. She emphasized, however, that "the amount of this ingredient used in nail products is over a thousand times less than the amount which could have any negative effect on fertility, and these products are applied to the nail, so the potential for the ingredient to be absorbed into our bodies is even smaller."
Despite the measured tone from industry experts, confusion has swirled among consumers. Many mistakenly believed that gel manicures themselves had been banned. In reality, the regulation targets only products containing TPO. As The Guardian and ITV News both clarified, salons may continue offering gel manicures using TPO-free products, and many manufacturers have already reformulated their polishes to comply with the new rules. Alternatives to TPO, such as TPO-L and BAPO, have been developed to provide similar curing times and the signature glossy finish beloved by gel manicure fans.
The new rules apply across England, Scotland, and Wales. Northern Ireland, meanwhile, continues to follow EU cosmetics legislation, while countries like the United States, Australia, and much of Asia still permit the use of TPO in nail products. This regulatory patchwork means that salons and distributors importing gel polishes must pay close attention to ingredient lists, especially those sourcing products from overseas markets.
For consumers, the changes may be less dramatic than the headlines suggest. TPO-free gel polishes are already widely available, and traditional air-dried nail polishes—never reliant on TPO—remain unaffected. Still, those concerned about chemical exposure can take simple precautions: applying sunscreen to hands before UV or LED lamp treatments helps reduce ultraviolet light exposure, as recommended by experts cited in Citizen Digital.
Enforcement of the new regulation is still evolving. Richard Knight, Trading Standards Lead Officer for Cosmetics and Beauty, advised, "Anyone who wishes to report any suspected illegal cosmetic product, including nail gels, can alert Trading Standards via the government-funded Citizens’ Advice Consumer Helpline." This public reporting mechanism aims to ensure compliance as the transition period unfolds.
But how did TPO land in regulatory crosshairs? The answer lies in the EU’s CLP (Classification, Labelling and Packaging) chemicals law, which requires substances to meet strict criteria regarding their hazardous properties. TPO was classified as toxic to reproduction after animal studies raised red flags about its potential effects on fertility. The CTPA, in partnership with the National Hair & Beauty Federation and trading standards, developed industry guidance to help salons and suppliers navigate the complex regulatory landscape.
It’s worth noting that the ban is not a response to everyday consumer risk. As Rainsford and other experts have repeatedly stressed, the likelihood of harm from typical salon use is exceedingly low. "The industry could not meet the two other requirements—lack of alternative ingredients and presence in food—despite its standard safety profile as a cosmetic product," Rainsford explained, highlighting the regulatory hurdles that ultimately led to TPO’s removal from the marketplace.
For nail technicians and salon owners, the transition may require a bit of adjustment but is far from catastrophic. TPO-free gels are already in circulation, and reputable brands have moved swiftly to update their formulations. As ITV News noted, consumers can check for TPO by reading the full chemical name—"trimethylbenzoyl diphenylphosphine oxide"—on product packaging. It’s unlikely to appear as "TPO," so a careful scan of the ingredients list is key.
The impact of the ban extends beyond British shores. Kenya’s burgeoning beauty industry, for instance, often imports gel polishes from the UK and EU. Citizen Digital reported that Kenyan salons and consumers should be vigilant about product ingredients, especially as international manufacturers adjust to the new regulations. As global cosmetic regulations tighten, demand for TPO-free products is likely to grow in markets far beyond Europe.
Looking ahead, the TPO ban serves as a case study in how science, regulation, and industry innovation intersect. It’s a reminder that the products we use every day are shaped by a complex web of safety assessments, legal standards, and consumer preferences. While the science behind these decisions can be complicated, the message for consumers is refreshingly clear: gel manicures aren’t going anywhere, but the ingredients behind them are evolving in step with our understanding of health and safety.
As the February 2027 deadline approaches, salons, suppliers, and beauty enthusiasts alike will be watching closely to see how the industry adapts—and what new innovations might be just around the corner.