“TPO, or trimethylbenzoyl diphenylphosphine oxide, is a key ingredient found in many gel products, especially top coats,” ...

“TPO, or trimethylbenzoyl diphenylphosphine oxide, is a key ingredient found in many gel products, especially top coats,” celebrity manicurist Michelle Class explains to British Vogue. TPO is not ...

As Europe's ban on a common chemical in gel nail polish goes into effect, should you start skipping the salon? In May, the European Union instituted a ban on trimethylbenzoyl diphenylphosphine oxide ...

Many Americans are left asking if their manicures are safe after the European Union moved to ban a popular ingredient. TPO's classification as “carcinogenic, mutagenic, or toxic to reproduction" seems ...

The substance, TPO, is still permitted in the United States. The European Union has banned a key ingredient found in many gel nail polishes, effective Monday, Sept. 1. The ingredient, trimethylbenzoyl ...

Women's Health may earn commission from the links on this page, but we only feature products we believe in. Why Trust Us? A common ingredient found in many gel nail polishes was just banned by the ...

Gel manicures are a beauty staple for millions, lasting weeks without chips and staying glossy through work, workouts and everything in between. But as of Sept. 1, 2025, the European Union has banned ...

In early September 2025, social media posts claimed that European regulators were going after gel nail polish. Some posts, such as this one on Instagram (archived), claimed they were banning a "key ...

Beginning Sept. 1, the European Union has banned an ingredient commonly found in gel nail polish. The banned substance, TPO (trimethylbenzoyl diphenylphosphine oxide), gives nails a super glossy sheen ...