1, peanut oil

Peanut oil is light yellow, transparent, clear in color, fragrant and delicious, and it is an easy-to-digest edible oil. Peanut oil contains more than 80% unsaturated fatty acids (including oleic acid 4 1.2% and linoleic acid 37.6%). In addition, it also contains 19.9% saturated fatty acids such as palmitic acid, stearic acid and arachidic acid.

Judging from the above, peanut oil has a good fatty acid composition and is easily digested and absorbed by the human body. According to foreign data, the use of peanut oil can decompose cholesterol in human body into bile acid and excrete it, thus reducing the cholesterol content in plasma. In addition, peanut oil also contains sterols, wheat germ phenol, phospholipids, vitamin E, choline and other substances beneficial to the human body. Regular consumption of peanut oil can prevent skin wrinkles and aging, protect blood vessel walls, prevent thrombosis, and help prevent arteriosclerosis and coronary heart disease. Choline in peanut oil can also improve the memory of human brain and delay the decline of brain function.

2. Rapeseed oil

Rapeseed oil is generally dark yellow or brown. Rapeseed oil contains 0.4- 1.0% arachidic acid, 0.4-19% oleic acid, 0.2-24% linoleic acid, 3 1-55% erucic acid and 0/-linolenic acid. In terms of nutritional value, the digestibility of rapeseed oil can be as high as 99%, which is beneficial to gallbladder function. When the liver is in a pathological state, the human body can also metabolize rapeseed normally. Rapeseed oil lacks essential fatty acids such as linoleic acid, and its fatty acid composition is unbalanced, and its nutritional value is lower than that of ordinary vegetable oil. In addition, rapeseed oil contains a lot of erucic acid, glucosinolates and other substances, which are generally considered to be unfavorable to human growth and development. If it can be eaten with high-quality edible oil rich in linoleic acid, its nutritional value will be improved

3. Sesame oil

Sesame oil includes common sesame oil and ground sesame oil, both of which are made of sesame oil. The fatty acids of oil extracted from sesame, whether sesame oil or ground sesame oil, generally contain oleic acid 35.0-49.4%, linoleic acid 37.7- 48.4% and arachidic acid 0.4- 1.2%. The digestion and absorption rate of sesame oil reached 98%. Sesame oil contains no harmful ingredients, but it is especially rich in vitamin E and linoleic acid. Regular consumption of sesame oil can regulate capillary permeability, strengthen the oxygen absorption capacity of human tissues, improve blood circulation, promote gonadal development, delay aging and maintain youthful appearance. Therefore, sesame oil is a high-quality edible oil with good edible quality and high nutritional value.

4. Cottonseed oil

Refined cottonseed oil is generally orange-yellow or brown, and the fatty acids contain palmitic acid 2 1.6-24.8%, stearic acid 1.9 -2.4%, arachidic acid 0.1%,oleic acid 18.0-30.7% and linoleic acid 44. Cotton clear oil contains a lot of essential fatty acids, and it is best to mix with animal fat, because the linoleic acid content in cotton clear oil is particularly high, which can effectively inhibit the rise of cholesterol in blood and maintain human health. The absorption rate of cotton oil in human body is 98%.

5. sunflower seed oil

The refined sunflower seed oil is clear and beautiful pale yellow or bluish yellow, with fragrant smell and pure taste. The composition of fatty acids in sunflower seed oil is influenced by climatic conditions. Sunflower seed oil produced in cold areas contains about 65438 05% oleic acid and 70% linoleic acid. Sunflower seed oil produced in warm areas contains about 65% oleic acid and 20% linoleic acid. The digestibility of sunflower seed oil is 96.5%. Rich in linoleic acid, it can significantly reduce cholesterol, prevent arteriosclerosis and prevent coronary heart disease. In addition, the content of tocopherol A with the strongest physiological activity in sunflower seed oil is higher than that in general vegetable oil. Moreover, the ratio of linoleic acid content to vitamin E content is relatively balanced, which is convenient for human body to absorb and utilize. Therefore, sunflower seed oil is an excellent edible oil with high nutritional value and beneficial to human health.

6. Linseed oil

Linseed oil is also called linseed oil. Linseed oil contains 9- 1 1% saturated fatty acid, 13-29% oleic acid, 15-30% linoleic acid and 44-6 1% linolenic acid. Linseed oil has a special smell, and its edible quality is not as good as peanut oil, sesame oil and sunflower oil. In addition, because it contains too much flax oleic acid, its storage stability and thermal stability are poor, and its nutritional value is also lower than that of edible oil mainly composed of linoleic acid and oleic acid.

7, safflower seed oil

Safflower seed oil contains 6% saturated fatty acid, 2 1% oleic acid and 73% linoleic acid. Because its main component is linoleic acid, its nutritional value is particularly high, which can prevent the deposition of human serum cholesterol on the blood vessel wall and prevent atherosclerosis and cardiovascular diseases. In the pharmaceutical industry, safflower seed oil can be used to make drugs to prevent and treat cardiovascular diseases, hypertension, liver cirrhosis and other diseases, such as Yishouning. In addition, safflower seed oil also contains a large number of medicinal components such as vitamin E, oryzanol and sterol, so it is known as a new "healthy oil" and "healthy nutritional oil".

8. Soybean oil

Soybean oil is dark in color and has a special bean smell; Thermal stability is poor, and more foam will be produced when heated. Soybean oil contains more flax oleic acid, which is easy to oxidize and deteriorate, resulting in "beany smell". In terms of edible quality, soybean oil is not as good as sesame oil, sunflower oil and peanut oil.

In terms of nutritional value, soybean oil contains 7- 10% palmitic acid, 2-5% stearic acid, 1-3% arachidic acid, 22-30% oleic acid, 50-60% linoleic acid and 5-9% linolenic acid. Soybean oil has a good fatty acid composition and is rich in linoleic acid, which can significantly reduce the serum cholesterol content and prevent cardiovascular diseases. Soybean also contains a lot of vitamin E, vitamin D and rich lecithin, which is very beneficial to human health. In addition, the human body's digestion and absorption rate of soybean oil is as high as 98%, so soybean oil is also an excellent edible oil with high nutritional value.

Edible oil-"symptomatic" purchase

Starting from 10 and 1 this year, the mandatory national standards for peanut oil and soybean oil will be formally implemented. The new standard clearly puts forward the requirements for the source of raw materials and the identification of processing technology, which undoubtedly makes the public pay more attention to the quality and nutrition of edible oil. Recently, the reporter visited the relevant experts of Shanghai Nutrition Society and Dietotherapy Research Association. They believe that when buying edible oil, besides considering the brand, taste and price, there is also a "symptomatic" knowledge.

Soybean oil reduces the risk of heart disease.

Soybean oil contains linolenic acid which can lower blood pressure, and does not contain cholesterol. Clinical nutrition experiments have confirmed that besides high cholesterol, the other two risk factors of coronary heart disease are hypertension and vascular embolism. The composition of soybean oil can just reduce these two factors, which can significantly reduce the blood cholesterol of healthy adults and effectively reduce the risk of coronary heart disease.

Corn germ oil can inhibit cardiovascular diseases.

Hyperlipidemia is the main cause of cardiovascular diseases, and maintaining human fat at a normal level is an important means to prevent cardiovascular diseases. In addition to doing more outdoor exercise or eating more vegetables and fruits, corn germ oil is a kind of vegetable oil rich in unsaturated fatty acids, which can effectively control the blood lipid level and thus achieve the purpose of inhibiting cardiovascular diseases.

Raw olive oil helps digestion and absorption.

Primary olive oil contains unsaturated fatty acids and has strong antioxidant capacity. Rich oleic acid can enhance the contractility of gastrointestinal tract, improve the secretion function of pancreas, liver and gallbladder, protect intestinal mucosa, make food well absorbed in gastrointestinal tract and relieve constipation caused by various reasons.

Sunflower seed oil helps to prevent skin diseases.

Sunflower seed oil is a low-fat oil, in which linoleic acid content is as high as 66%, which is much higher than other oils on the market. In addition, sunflower seed oil also contains lecithin and carotene, but does not contain harmful substances such as erucic acid and cholesterol. Long-term consumption can prevent dermatosis, bronchiectasis and night blindness, lower human blood pressure and lower serum cholesterol.

Peanut oil lowers blood total cholesterol

Oleic acid contained in peanut oil can reduce blood total cholesterol and harmful cholesterol, but it can't reduce beneficial cholesterol. Oleic acid is called safe fatty acid in the field of nutrition, which can effectively prevent cardiovascular diseases. Compared with the basic diet, the peanut oil diet rich in oleic acid and peanut oil plus peanut diet, like the low-fat diet, both reduced the total cholesterol and harmful cholesterol.

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Cooking oil should not be stored for a long time.

Many housewives like to buy large-capacity barrels of cooking oil, thinking that they can save worry. If the family has a large population and the oil is used quickly, this is a good idea. However, if the family has a small population and the oil is used slowly, it is not cost-effective to buy a large barrel of cooking oil, because cooking oil cannot be preserved for long.

Cooking oil is easy to deteriorate, because oil will automatically oxidize. The oxidation of oil will produce a lot of toxic oxidative decomposition substances. If people eat deteriorated oil for a long time, it will cause cell failure and induce many diseases. Peroxide formed after oil oxidation will cause rancidity and produce unpleasant smell. The rancidity of oil is not as easy to attract people's attention as the corruption and mildew of food. When we smell the peculiar smell, the hydrogen peroxide content of engine oil has greatly exceeded the national standard value.

Therefore, in order to avoid the deterioration of edible oil, consumers are advised to buy small-capacity barrel oil.