how long does cheese last unopened
Keep in mind that an unopened container of ricotta may stay fresh for two to four weeks, and may be good for a week or two past this date. However, if the date has long since come and gone, it's a safe bet that the cheese is no longer good. When in doubt, throw it out.
How long cream cheese will last depends upon the processing method. (The âhot packâ method kills more bacteria than âcold packâ processing, so the product lasts longer, 3-6months.) There are even cream cheese products that are shelf stable (no refrigeration necessary) until opened.