Under good storage conditions and without deterioration, whole walnuts cannot be eaten after about 0.5-1 year, while walnuts without skins cannot be eaten after 3-6 months. However, if the walnuts deteriorate prematurely due to other factors, they cannot be eaten even if they have not expired.
1. Whole walnuts: If they are whole walnuts, they are usually not easy to deteriorate due to the protection of the outer skin, and the internal ingredients are not exposed to moisture and air. They can generally be stored for 0.5-1 year. However, if they exceed 1 year, they will generally exceed the normal shelf life of walnuts. At this time, the nutrients inside the walnuts will be significantly lost, and even the ingredients may have deteriorated. It is not recommended to eat them;
2. Walnuts without skin: If the walnuts have been peeled, the internal meat will be in direct contact with the external environment, which will shorten the shelf life of the walnuts. Generally, the walnuts may shrink and dry after 3-6 months, and because of long-term contact with air, it is very easy to attract bacteria and reproduce inside, so it is generally recommended to eat walnuts without skins as soon as possible.
In addition, if the walnuts are within the shelf life but mold or taste change prematurely due to improper storage environment or other factors, you should stop eating them even if they are not expired. At this time, the walnuts have already deteriorated and grown mold prematurely, and have no edible value. It is recommended to eat walnuts as soon as possible after purchase to ensure that the body takes in more nutrients.