Peanuts are a very sensitive type of nut; improper storage can result in loss of flavor and potential health risks. The best peanuts are white, sized between 5-7 mm, and should be consumed shortly after roasting.
Therefore, peanuts in bags typically have a shelf life of 15-20 days, while those in vacuum-sealed containers can last about 6 months. Once opened, the peanuts should be consumed within a week for optimal taste.