Primary soybean oil is the best. First-class soybean oil is the first-class high-quality soybean oil with the highest quality standard. It has the highest refining degree and the least impurities and residues, which can better protect our health.

There are also differences in the preparation methods of primary soybean oil. At present, soybean oil on the market is mainly prepared by pressing and leaching. Squeezing is a physical way for soybean oil manufacturers to prepare soybean oil, and leaching is a chemical way for soybean oil.

These two preparation methods have their own advantages and disadvantages. The amount of soybean oil produced by pressing is less, and the oil yield of soybean oil produced by leaching is higher than that of pressing, but the leached soybean oil will contain some chemical residues.

Advantages and disadvantages of soybean oil:

Advantages: Soybean oil is mainly linoleic acid, containing a small amount of α -linolenic acid and very little saturated fatty acid. Linoleic acid has a limited effect on reducing the risk of heart disease, but α -linolenic acid is more beneficial.

Clinical nutrition experiments have confirmed that besides high cholesterol, the other two risk factors of coronary heart disease are hypertension and vascular embolism, and linolenic acid can just reduce these two factors. Soybean oil is rich in vitamin E, and its yellowish color comes from a small amount of carotene.

Disadvantages: Because linoleic acid and linolenic acid are not heat-resistant, linolenic acid is particularly afraid of heat, and it is easy to oxidize and polymerize after frying or repeated heating, which is very harmful to health.

Refer to the above? Baidu Encyclopedia-National Quality Standard for Soybean Oil

Refer to the above? People's Daily Online-China People's Guide to Healthy Consumption of Soybean Oil