Unopened bottle of walnut oil will last for more than 1 year if properly stored. Already used up bottles of this edible oil will last for only 6 months.
What You can Do To Prevent Spoilage?
1) Wrap up the unused bottles with brown paper covers, this helps in protecting the oil from both moisture and light.
2) Never store the used walnut bottles with root vegetables, instead keep them in refrigerator.
To know the health benefits of this oil, click here.