ANSWERS: 2
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Sour cream can last between one and three weeks when stored in a refrigerator at 40 degrees F, according to the United States Department of Agriculture Food and Nutrition Service. Its high moisture content can breed bacteria without visible signs, so the USDA recommends discarding sour cream after this period.
Source:
United States Department of Agriculture Food and Nutrition Service: Refrigerator Storage Times
United States Department of Agriculture Food Safety and Inspection Service: Molds on Food
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it probably goes by the expiration date
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