Can you still eat cooking oil that has not been opened after it expires?

Once the oil has expired, it cannot be consumed.

Edible oil, like other foods, has a shelf life, and eating expired edible oil will cause harm to the human body. Edible oil is most afraid of oxidation, rancidity, after rancidity of oil, when heated, smoke, choking, which contains decomposition epoxy propionaldehyde, etc., easy to poison after eating. Therefore, whether it is opened or unopened, do not eat edible oil once it expires.

Under normal living conditions, edible oil without added antioxidants will generally reach the critical point of deterioration after 2 months of opening. After a few days, the characteristic "hala smell" of rancidity will appear. Edible oil with added antioxidants can be stored for a longer time after the lid is opened, but there is no research conclusion on how long.

In general, it is recommended that everyone eat it within 3 months.

It is recommended not to eat the unopened edible oil after the expiration date, because the expired edible oil is very likely to spoil and deteriorate, and then breed bacteria or toxic and harmful substances, which is generally invisible to the naked eye.

If you eat it at this time, it is very likely to cause food poisoning, which is a threat and harm to your health, so it is important to remember that you should not eat anything after the expiration date, including cooking oil.

It is better not to use.

Because the cooking oil is likely to have deteriorated at this time, if you eat it, it will cause discomfort to our body. We should try to avoid hoarding cooking oil and try to use up the opened cooking oil within three months to avoid it spoiling.

Edible oil has been stored for a long time, especially the residual crude oil, which contains more plant residues, and the rancidity of oil and fat can occur. Edible oil contains a linoleic acid component, which is easy to chemically react with oxygen in the air, a phenomenon called "oil oxidation". A series of reactions such as oil and hydrolysis can generate small molecule aldehydes, ketones and carboxylic acids and other oxides, peroxides and other decomposition products with special odors.

After the rancidity of the oil, the smoke is large and choking when heated, which contains decomposition products such as epoxypropionaldehyde, which is easy to be poisoned after eating.

Unopened and expired cooking oil can no longer be eaten. Even if the barrel of cooking oil is unopened, it cannot be eaten after it has expired. After the edible oil expires, the substances in it will also deteriorate, the appearance is relatively turbid, which has a certain amount of peroxide, and long-term consumption of expired edible oil is not conducive to health.

Edible oil preservation method:

1. Low temperature storage.

The storage temperature of edible oil is 10 15 is the best, and generally should not exceed 25. Therefore, it is not advisable to store too much edible oil in summer, and you should use it while buying it, and consume fresh oil frequently. When cooking oil is not in use, in addition to staying away from the stove, it should also be avoided near heating pipes, high-temperature appliances, etc.

2. Store in the dark.

It is best to store cooking oil in a backlit and ventilated place, because ultraviolet and infrared rays in the sun can also promote the oxidation of oils and fats and the formation of harmful substances.

3. Choose the right container.

The materials of the storage container should not leak, do not deteriorate, circulate safely, and meet the requirements of food hygiene, and can prevent contamination by dust, microorganisms and toxic and harmful substances. The container for storing oil must be clean, dry and well sealed.

4. Pay attention to moisture-proof.

The oil storage location should be kept dry and ventilated, as increased moisture will accelerate the hydrolysis and rancidity of edible oils.

5. Keep it sealed.

Edible oil should be contained in containers that can be strictly sealed, and should not be stored in open containers. The lid of the container must be screwed down so that it is tightly sealed. The number of times the lid is opened should be minimized to avoid excessive contact with air and oxidation of the cooking oil.

Cooking oil cannot be eaten after it has expired. Because the expired edible oil is stored for too long, the nutrients in it will produce chemical reactions, resulting in some carcinogenic substances, which are harmful to the human body if used for a long time.

1. Introduction.

Edible oil, also known as "cooking oil", refers to the use of limbless, animal or vegetable oils and fats in the preparation of food. It is liquid at room temperature. Due to the raw materials, processing technology and quality, the common edible oils are mostly vegetable oils, including rapeseed oil, peanut oil, hemp oil, corn oil, olive oil, camellia oil, palm oil, sunflower oil, soybean oil, sesame oil, flaxseed oil (flax oil), grape seed oil, walnut oil, peony withered seed oil and so on.

Second, the type of edible oil.

(1) Rapeseed oil. Commonly known as rapeseed oil, also known as rapeseed oil, coriander oil, brassica oil, sesame oil, canola oil, is a kind of edible oil squeezed from rapeseed. It is one of the main edible oils in China.

(b) Olive oil. It is a woody vegetable oil, which is made directly from fresh olive fruits, which are not heated and chemically treated, and retain their natural nutrients.

(3) Flaxseed oil. Flaxseed oil is made from flaxseed, which is the seed of flax, which belongs to the flaxaceae family, also known as flax.

(4) Peanut oil. Peanut oil, light yellow and transparent, bright color, fragrant smell and delicious taste, is a relatively easy to digest edible oil.

3. The role of edible oil.

(1) Heat transfer of oil. Makes the dish tender or crispy. In the cooking process, the use of grease as a heat transfer medium is widely used, due to the high ignition point of grease, after heating, it can speed up the cooking speed, shorten the cooking time of food, and keep the raw materials fresh and tender.

(2) Improve the color of dishes. Oils and fats can give dishes a variety of different colors. Oil can be 1 times higher than water or steam, quickly dissipate the moisture on the surface and inside of the raw materials, and the oil molecules penetrate into the inside of the raw materials, so that the dishes exude an attractive aromatic smell, thus improving the flavor of the dishes.

(3) Increase nutrient content. During the cooking process, the flavor of the dish is not only improved due to the penetration of fat into the tissues of the raw material, but also the nutritional content of some low-fat dishes is supplemented, thereby increasing the calorie, i.e., nutritional value of the dish.

Is this expired for a long time? Does it smell like hala oil? If it has just expired and there is no bad smell of oil, it can be used.

The fried fritters we buy outside and any food that uses oil are not necessarily better than our expired oil. Of course, it's better to eat less when it's expired. Expired oil can also be used to fertilize plants.

Can you eat cooking oil when it expires.

Edible oil can not be eaten after expiration.

The biggest change after the expiration of edible oil is that it will oxidize, and some peroxides will be produced after oxidation. These peroxides are further oxidized and decomposed, which will have some toxic or *** effects on the quality of the oil.

Expired cooking oil will be oxidized to produce lipid peroxide, which is not only bad for blood vessels, but also carcinogens.

Cooking oil cannot be eaten after it expires.

Edible oil has a certain shelf life, only within the shelf life can be safe to eat, if the expiration date is over, do not eat again, if the consumption of expired edible oil will cause harm to the body.

Expired edible oil can be used to raise flowers, expired edible oil can be used to water flowers, edible oil must be far away from the root system, not poured on the roots of plants, if poured directly on the roots, it is easy to cause the plant to burn the roots. Not all flowers can be used when using expired cooking oil, such as junzi orchid, orchid, etc.

WarrantyDeposit Method:

1.Avoid light exposure: The packaging of transparent glass or acrylic plastic can make the color of the grease clear at a glance, but the packaging method of this bridge cherry seed can easily expose the oil directly to the sun, causing oxidation reaction, and then producing undesirable substances; Vitamin E, the natural antioxidant in oils and fats, can also be destroyed, reducing the value of oils and fats.

It is recommended to store in a cool place away from sunlight.

2.Avoid contact with air: Grease is often exposed to air, the oxidation rate will accelerate and deteriorate, it is recommended that when buying edible oil, you can use dark small bottles and cans to divide the oil, and the chain should be tightly capped immediately after each use, to avoid contact with too much air and deterioration.

In addition, the shelf life of edible oils and fats is about 2 years, and they should be used up within 3 to 6 months after opening the bottle to ensure freshness and safety.