How long do kegs of pasteurized beer last when refrigerated?

Kegs of pasteurized beer can last for approximately 90-120 days when stored under refrigeration. This increased shelf life is primarily due to the pasteurization process, which eliminates harmful microorganisms that could lead to spoilage. When pasteurized beer is kept at a stable, cold temperature, it helps to maintain flavor stability and prevents oxidation, allowing the beer to remain fresh and safe to drink over an extended period.

In comparison, unpasteurized beers typically have a much shorter shelf life, often only lasting a few weeks under similar conditions due to the presence of live yeast and potential bacterial contamination. Thus, the duration provided in the correct answer reflects the standard expectation for pasteurized beer in optimal storage conditions.