Because of their high fat content, nuts turn rancid quite quickly in warm or damp conditions and they are best bought only when you intend to use them, and in small quantities. They can be stored in the refrigerator or freezer, providing they are kept very dry, or in airtight plastic containers.
Nuts sold in vacuum-sealed packs showing a 'use-by' date are the best to buy, as they will keep in a cool, dry cupboard until you are ready to use them. Once the packet has been opened, however, the nuts should be kept in an airtight container and eaten quite quickly.
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