Worst: Whole Grains
Whole grains have oils in them. They are present in the bran and germ of the grain, which is why these products go bad pretty quickly. This is also the case for seeds and nuts. Even though the oils are taken away when they are processed, it is possible that they will remain attached to the grain.
Whole Grains
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Worst: Jerky
Beef jerky is preserved with the use of salt and spices, so you might assume that it will stay fresh for some time. This is not the case. The snack needs to be refrigerated as soon as it is opened. A lot of jerky packages should be eaten three days after it is opened and kept in the fridge. The jerky will not last longer than a week or two after it is refrigerated. This is the reason you should get the small packages instead.
Jerky