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Quick Answer. Yogurt can be eaten past the expiration date. An unopened container of regular plain yogurt can last two to three weeks past the expiration date. But once opened, the yogurt is only good for one week past the expiration date. Continue Reading.
1 To further extend the shelf life of yogurt, freeze it in a covered airtight container.  How long does yogurt last in the freezer for safety purposes? The freezer time shown is for best quality only â foods kept constantly frozen at 0Â° F will keep safe indefinitely.