3-Free Nail Polish Nail polishes free of formaldehyde, toluene and dibutyl phthalate (DBP) are the OG of non-toxic nail polishes, and it used to be the quality everyone hip to the green scene looked for in their bottles of lacquer. Now, though, it's hard to find a polish that isn't three-free. And with good reason: formaldehyde is a known carcinogen; toluene is found in gasoline and is a respiratory toxicant; and dibutyl phthalate, the chemical that makes plastic flexible, is listed as having potentially harmful reproductive effects by the Environmental Protection Agency. These are the three substances that pose the most risk to nail salon workers. Here are a few of our favorite three-free nail polishes.
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