Expired cooking oil cannot be used unless it has been opened.

Expired cooking oil will produce other toxic substances, such as peroxides, during the rancidity process. After the oil becomes rancid, it becomes smoky and choking when heated. It contains decomposed products such as epoxy propionaldehyde, which can easily lead to poisoning after consumption, causing patients to suffer from acute respiratory and circulatory failure.

There is a clear shelf life on the outer packaging of edible oil. Generally it is 18 months. The biggest change in edible oil after it expires is that it will oxidize, and some peroxides will be produced after oxidation. If these peroxides are further oxidized and decomposed, they will have some toxic or side effects on the quality of the oil.

Take the most commonly used peanut oil as an example. Peanut oil is mainly composed of unsaturated fatty acids. After peroxidation, all vegetable oils will become rancid. Therefore, it is recommended not to eat edible oil after its shelf life. . For example, if you bought it two years ago, it has a shelf life of 18 months. Even if it has not been opened, do not eat it again.

Extended information:

Turn expired cooking oil into treasure:

1. Growing flowers

Expired cooking oil is not All flowers can be used. For plants such as clivia and orchids, it is very effective to use expired cooking oil to grow flowers. However, it is recommended that you do not use it for other flowers.

2. Use as lubricating oil

Expired cooking oil can also be used as lubricating oil. It can be used for locks that are difficult to open at home or rusty bearings. Drop some expired cooking oil to lubricate, and you can also apply some on iron products to prevent the surface of iron products from rusting.

3. DIY handmade soap

Expired cooking oil can also be used to make handmade soap, which can also save a lot of money for families.

Xinhuanet-The Food and Drug Administration reminds you to pay attention to the shelf life of meat products, edible oil and eggs