Web Reference: FAQ 1: How long can I safely keep unopened Boursin in the refrigerator past the “best by” date? Generally, unopened Boursin stored properly in the refrigerator can be safe to consume for up to 1-2 weeks past the “best by” date, provided it shows no signs of spoilage. Boursin cheese is typically sold with a “best by” date, but it can still be good to eat after that date. However, the quality of the cheese will start to decline after the “best by” date, so it is best to eat it within a few weeks of purchase. Leftover Boursin sitting in the fridge after a party is a common enough situation, and the question is always the same: how much longer is it actually good? Opened Boursin cheese lasts 7-10 days in the fridge, while an unopened foil-wrapped portion stays fresh for 3-4 weeks.
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