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    We Asked The FDA About 8 Popular Food Safety Myths

    From drinking old milk to storing butter at room temperature to double-dipping chips.

    In the world of eating, there are a ton of food rules (like the five-second rule) that most of us live by, but never truly question.

    To get to the bottom of widely believed food rules, and find out what's true and what's bogus, I reached out to the agency that regulates food safety.

    To ease your eating worries, here's the lowdown on eight food safety questions you've likely had or heard at one point in your life:

    Food "Rule" #1: It's unsafe to drink milk past its sell-by date, even if it's just a day or two.

    Food "Rule" #2: You shouldn't drink from a cup of water that has been left sitting out overnight.

    Food "Rule" #3: White discoloration on a chocolate bar means the chocolate has gone bad.

    Food "Rule" #4: Butter should be stored in the fridge, not at room temperature in a butter dish.

    Food "Rule" #5: All fruit and vegetables should be washed before eating.

    Food "Rule" #6: Raw eggs will make you sick.

    Food "Rule" #7: You shouldn't double-dip.

    Food "Rule" #8: If you bring a homemade salad to work, you should refrigerate it immediately. Keeping it at room temperature will make it go bad by lunchtime.