The nail polish is past its prime Have any nail polishes lingering in your beauty cabinet that have been around for a decade (or, gasp, two)? Nail polishes are only good for about two years — after that, it's best to throw them out. If, for some reason, there's not an expiration date on the nail polish, Hipp recommends using your best judgment. "If it looks like it's been sitting on the shelf for a while, it probably has," she says. "This is why I prefer to purchase polish in a heavy-traffic area, ensuring the product has recently been replenished and hasn't sat on the shelf for too long."
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