The large and small barrels of oil in the supermarket are mainly commodity oil, which is processed by large oil pressing companies through systematic pressing and leaching. The processing environment of commodity oil is sterilized and needs to be tested by the state before it can appear in front of us. Self-squeezed oil appears in rural towns, usually raw materials such as soybeans, peanuts or rapeseed, which are prepared by ourselves and squeezed by them in the small workshop of frying machine. This is what we often call crude oil.
Self-squeezed oil can also be animal oil, and you can drive by yourself. The most common one is made from pig fat oil. The biggest difference between bottled oil in supermarkets and self-squeezed oil in rural areas is the difference in technology, and the bottled oil is mostly mixed oil, while the self-squeezed oil is mostly single pure crude oil. Looking at the output difference between barrel oil and self-squeezed oil, the problem comes. Is the self-squeezed oil produced by small workshops really safe?
Many small oil-squeezing workshops, because of the small space, the site and machinery are not cleaned regularly, and most of them are messy, and even black oil residue is often seen at the oil outlet and feed inlet. In addition, there is no professional anti-mildew and detoxification work. These residues may produce toxic substances such as Aspergillus flavus after a long period of time. When these substances exceed the standard, users may be poisoned or die. Some cheeks blinded by interests will also replace the high-quality raw materials you have prepared and adulterate the deteriorated raw materials. There is little difference between oil and orange, but it greatly increases the risk of aflatoxin exceeding the standard. The only advantage of self-extracting oil: the safety of raw materials has also been changed by merchants. Moreover, the test data of the Food and Drug Administration show that the content of polycyclic aromatic hydrocarbons in many rural self-squeezed oils exceeds the standard, and they have not been refined, deacidified and deodorized. Therefore, the shelf life of self-help tour is short, the oil smoke is large, and it is not so safe to use. Compared with bottled oil in the supermarket, which is better?
In fact, it does not mean that bottled oil sold in supermarkets is absolutely safe. In 20 19, the state conducted special sampling inspection and found that peanut oil additives and toxic substances in 20 enterprises exceeded the standard. Long-term intake of these toxic oils may lead to lung cancer and cardiovascular diseases. Self-squeezed oil and barrel oil have their own advantages and disadvantages. The oil squeezed in a clean and reliable workshop can better retain the nutrients of raw materials. In addition, without additives, the taste of oil is stronger and the cooking is more fragrant, but there are many impurities in it, which is not easy to preserve.
Although barreled oil has a long shelf life and reliable conditions for oil extraction, many people just feel that there is no unique fragrance of self-extracted oil, and it only tastes greasy. If raw materials, machinery and equipment, and site hygiene can be guaranteed to be qualified, it is not bad to eat self-squeezed oil occasionally. If you can't buy this kind of safe self-squeezed oil, when choosing bottled oil in the supermarket, try to choose the squeezed edible oil of big brands, which is both safe and rich in flavor.