Use it
Some nail-polish brands now offer formulas free of dibutyl phthalate (DBP), but not all list the ingredients, so stick with brands such as L'Oreal Steel Colour, Firoze and Acquarella. > Try L'Oreal Steel Colour in Sheer Valor, $6.
Lose it
Manicures are fine, but a study by the Environmental Working Group warns against using nail polishes that contain DBP, an ingredient linked to birth defects in animals.