Is pressed oil produced by oil mills healthier than extracted oil?
The pressed oil produced by oil mills generally refers to the peanuts, rapeseed and other oil crops grown by people in rural areas. After cleaning and screening, they will be taken to the local oil mill for pressing to obtain peanut oil or rapeseed oil, which has a strong aroma; And leached oil is a vegetable oil produced by large-scale oil factories using the leaching process, with a clear oil quality. So is pressed oil produced by oil mills healthier than extracted oil?
The answer is negative.
The production principle of the pressing method is to use mechanical external force to press the oil from the oilseed. After one pressing, the residual oil in the cake is about 3% to 5%. The most commonly used oil pressing equipment on the market is the screw press. Under the pressure of the squeezing chamber, oil is squeezed out, retaining the nutrients, active substances, flavor, as well as trace beneficial components such as sterols and vitamin E. However, at the same time, a large amount of impurities such as microorganisms, toxins, suspended solids, etc. remain in the oil, which requires refining equipment. The public receives unrefined pressed crude oil.
In addition, some oil mills have limitations in production and processing due to technical processes, non-standard operations, and substandard production environments. The quality of the pressed oil is also difficult to guarantee, and such oil cannot be considered healthy oil. Compared with the extracted oil that has undergone strict refining processes in the market, it is difficult to stand shoulder to shoulder in all aspects, let alone be healthier than extracted oil.
The principle of oil extraction is to use an organic solvent that can dissolve oil and fat, and through contact (soaking or spraying) with the oil, extract the oil and fat from the oil. This is a method of oil production. Generally speaking, the extracted oil sold in supermarkets undergoes strict quality inspection before leaving the factory. The harmful substances in the oil have been fully separated. When selecting edible oil, the health of the oil should not be judged by the extracted oil and pressed oil. Extraction and pressing are only the process methods used by oil factories to extract oil. Different types of oil have different oil contents and are suitable for different oil production processes.
