Most of your favorite brands probably don't contain formaldehyde at this point (luckily!), but there are also a few overall standouts it's always good to give a little recognition. First and foremost, of course, there's drugstore staple and color panoply Essie Nail Polish. They're formaldehyde, DBP, and toluene free, in addition to being easy to apply and relatively inexpensive. Tenoverten Nail Polish is even more free of maybe not-so-hot stuff—there's no formaldehyde, dibutyl phthalate (DBP), toluene, formaldehyde resin, or camphor, either.
Butter London Lacquer is another polish that has lots of fab shade options, wears beautifully, and is free of so many things that you're kind of left wondering what, exactly, it is made of. It doesn't contain parabens, sulfates, synthetic fragrances, petrochemicals, phthalates, GMOs, triclosan, OR formaldehyde, DBP, and toluene. If you're vegetarian or vegan, there's even a formaldehyde-free polish just for you—all SpaRitual Nail Lacquer is guaranteed vegan and cruelty free.