What is the shelf life of vegetable oil?

Generally, the shelf life of rapeseed oil is 18 months under normal temperature and dark environment. 2-3 years old rapeseed oil has exceeded the standard shelf life, and it may have deteriorated at this time, so it is not recommended to eat it again.

Rapeseed oil will go rancid if it is stored for a long time, mainly because unsaturated fatty acids such as linoleic acid easily react with oxygen in the air, which is called oil oxidation. At this time, not only has the taste of rapeseed oil changed, such as the taste of saliva, but it may even stimulate the gastrointestinal tract. After eating it, there will be symptoms of gastrointestinal discomfort, such as nausea, vomiting and diarrhea.