Nut oils, being high in polyunsaturated fat, oxidize easily and go bad without proper storage. Air, light, and heat are their greatest enemies.
To maximize the longevity of nut oils, store them in a sealed, dark container in a cool place, preferably in the fridge to keep them fresh.
Hazelnut and walnut oils have short shelf lives, lasting three to four months in the pantry, but can last longer when refrigerated.
Rancid oils are easily identifiable by a bitter taste and unpleasant smell and may lead to digestive issues due to the presence of free radicals.
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