Although it is not necessary, it is always better to bring your own nail polish to the salon.  If anything, you can bring your own base coat, which touches your nail first, with the other layers on top.  Our office carries Dr Remedy nail polish.  Its benefits are that it is free of formaldehyde, and toluene, and it contains garlic bulb extract and other natural ingredients.  Plus, the colors are always beautiful. So although it is not necessary, if you want to be extra cautious and do not want to share the bottle with whomever was there before you, consider taking your own nail polish to get a pedicure.