How long sauerkraut lasts after it’s opened depends on the sauerkraut. Has it been stored properly? Is it contaminated? Is it pasteurized? These are determining factors for how long sauerkraut can last after it’s been opened. Below are some approximations:
Unpasteurized sauerkraut can last 4-6 months in the refrigerator.
Pasteurized sauerkraut lasts for about 7-10 days in the refrigerator.
If you suspect your sauerkraut has gone bad, do not risk eating it. Instead throw it away.
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