What is the sell-by date for ultra-pasteurized milk products?

The sell-by date for ultra-pasteurized milk products is typically 45 days. This is because ultra-pasteurization involves heating the milk to a higher temperature than regular pasteurization, which extends its shelf life significantly. This extended shelf life allows consumers more time to purchase the product while ensuring safety, as ultra-pasteurized milk can maintain quality for a longer period when stored properly.

Other options reflect shorter durations that do not align with the longer shelf life characteristic of ultra-pasteurized products. Regular pasteurized milk has a shorter sell-by date, usually around a week or so, which explains why the other choices would not be correct.