The processing of cooking oil can be divided into cooked pressing method and raw pressing method . Among them, cooked pressing method, also known as hot pressing method , generally heats the oil at high temperature to cause a series of changes inside the oil; while raw pressing method, and Called the cold pressing method , it is generally carried out without heating or at low temperature before the oil is pressed.
Advantage

Cooked pressed oil has a pure and fragrant taste, darker color, and the pressing process is faster than raw pressing. Raw pressed oil is oil processed by physical methods. It is pressurized without heating up. Although the pressing process is cumbersome, it retains the natural flavor and color of the oil , completely preserves the nutrients in the oil, and avoids the occurrence of high temperature. of trans fatty acids. Generally speaking, raw pressed oil is clearer in color and better in color than cooked pressed oil.
Shortcoming

Cooked pressed oil has been leached and refined during processing, which will cause solvent residues and cause the loss of most fat-soluble vitamins (emphasis added). In addition, if the cooked pressed oil is directly cooked in the pot without treatment, it is easy to foam and silt the pot.

Raw pressed oil has not been steamed and fried, and its water content is unstable, which is not conducive to long-term storage . Since the raw pressed oil has not been subjected to high temperature treatment, sometimes the quality of the raw pressed oil will be affected due to the maturity and harmful substances of different oil plants. In addition, the aroma of the oil is not as strong as that of the hot pressed oil.

It should be noted that during the cooking process, raw oil will produce oily fumes, and the oil can be heated before cooking, but it is rich in nutrients, such as vitamin E, carotenoids, etc., and its overall nutritional value is high; while Cooked pressed oil has a small amount of oily smoke, and tastes more fragrant than raw pressed oil, but most of its nutrients are lost after high-temperature treatment. Therefore, based on a comprehensive judgment, the editor recommends raw pressed oil !