The European Union just banned a common gel nail polish ingredient, calling it "carcinogenic, mutagenic or toxic for reproduction." Why it matters: TPO, short for trimethylbenzoyl diphenylphosphine ...
A key ingredient used in many brands of gel nail polish has been banned in most of Europe but it remains on sale and available in the U.S. Trimethylbenzoyl diphenylphosphine oxide, commonly known as ...
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