Can unopened cooking oil be eaten after it has expired?

Eating expired edible oil will do harm to human body.

Edible oil, like other foods, has a shelf life. What edible oil is most afraid of is oxidative rancidity, which produces spicy taste. After rancidity, the oil is heated and smoked, which contains decomposition products such as epoxypropanal, which is easy to be poisoned after eating. Expired edible oil will be oxidized to produce lipid peroxide, which is not only bad for blood vessels, but also carcinogenic. So don't eat any unopened or unopened cooking oil once it expires.

In normal living environment, edible oil without antioxidants will generally reach the critical point of deterioration two months after opening. In a few days, there will be a unique "spicy taste" of oleic acid. Edible oil with antioxidants can be stored for a longer time after opening the lid, but the specific storage time has not been studied. In general, it is recommended that you eat it within 3 months.