The shelf life of normal edible oil is generally about 18 months, and it is required to be sealed in a cool and dry place away from light. Rapeseed oil beyond the shelf life is prone to quality degradation due to oxidation, rancidity and other reasons, its nutritional value will be greatly reduced, and harmful substances will be produced.

Even if the storage conditions are good, rapeseed oil is likely to have deteriorated after three years, which may have negative effects on health, such as gastrointestinal discomfort and even food poisoning.