Edible oil is indispensable in people's daily life, but there are various oils on the market. The biggest choice now is whether the regular oil sold in the supermarket is better or the oil squeezed from the countryside is better. First of all, because of the appearance of fake oil and waste oil reported in the market, people are worried about the bottled oil in the supermarket, so many people will choose to press their own materials with confidence and feel that their materials are safe to eat.

In the eyes of many rural people, it must be that self-extracting oil in rural areas is better, the raw materials are authentic, safe and without additives. The squeezed oil looks pure and delicious, unlike supermarket oil, some of it is just like water, and the taste is still very poor, and the fried dishes are tasteless. Self-extracting oil in the countryside, handed down from generation to generation, has been eaten for so long. Why do you question it, but is this really the case?

First of all, from the perspective of raw materials,

High-quality rapeseed or peanut seeds are generally used as raw materials for self-extracting oil in rural areas, but the source of raw materials cannot be traced back to bottled oil in supermarkets. So, by contrast, does the high reliability of raw materials for self-extracting oil in rural areas mean the high safety of edible oil?

Actually, it's not. In order to meet the international requirements, the factory must go through the refining process to filter out the impurities in the oil. However, small workshops often lack professional refining equipment and fail to meet the filtration standards. The substandard oil generally contains impurities with low boiling point, including free fatty acids and pigments, which are easy to bubble and smoke when cooking. However, these are only minor problems. What really deserves attention are the following two:

First, polycyclic aromatic hydrocarbons exceed the standard.

Self-pressing oil generally needs to be fried first and then physically pressed. However, if the frying temperature is too high or local burning occurs, polycyclic aromatic hydrocarbons are likely to be produced due to pyrolysis and incomplete combustion of organic matter. Polycyclic aromatic hydrocarbons (PAHs) are toxic, genotoxic, mutagenic and carcinogenic, which can cause many kinds of harm to human body and should not be underestimated. According to the test results of Food and Drug Administration, the content of polycyclic aromatic hydrocarbons in oil produced by many small workshops in rural areas is more than twice the maximum dose. In the production process, large manufacturers have gone through degumming, deodorization, dewaxing, decoloration, deacidification, pre-screening, quality control and other steps, and removed harmful substances to a great extent.

Second, aflatoxin exceeded the standard.

Aflatoxin is a highly toxic carcinogen in fatty liver. Some time ago, it was reported that a family of eight people in Heilongjiang died of food poisoning, and the northeast was called "tea bar", which was repeatedly freeze-dried and moldy. Aflatoxin, especially aflatoxin B 1, can not only cause wrong DNA repair in cells, resulting in DNA mutation, but also inhibit the cooperation between DNA and RNA, thus inhibiting the synthesis of protein. According to the national food safety standards, the limit of aflatoxin B 1 in peanuts and its products is more than 20g per kilogram.

For regular brand manufacturers, there will be professional equipment to clean and screen raw materials before oil extraction. We don't have to worry about the problem of aflatoxin exceeding the standard, but small workshops are not necessarily. Due to the lack of professional monitoring institutions, moldy raw materials will inevitably be mixed, causing food safety hazards.

Secondly, from the price analysis.

At present, the price of peanuts is 6~7 yuan per catty, and a catty of peanuts can squeeze out a little more than 4 liang of oil, per catty 15 yuan. I made a special trip to the supermarket this morning. The most expensive price of five liters of barreled peanut oil is 137 yuan, equivalent to 9.2 kg. After calculation, it is close to1A Jin, 5 yuan, and the price makes no difference.

There is cheaper oil extraction in the supermarket. The cheapest 5L is only 85 yuan. If the Ministry chooses pressed oil, other extracted oil and genetically modified oil, it will be cheaper and you can't imagine it. How can it be so cheap? In fact, the oil extraction technology of large manufacturers is advanced, and the peanut meal squeezed out of rural areas can be recycled to the factory for re-pressing. Therefore, the oil yield of manufacturers is higher than that of small workshops in rural areas. Moreover, peanut, soybean and rapeseed can be fully extracted by chemical extraction after being squeezed, which is also the reason why the factory produces oil with low cost and price.

However, if the price is particularly low, you should be careful. Be sure to identify whether it is still pressed oil, press grade, and whether the raw material used is genetically modified soybean, which will affect the price of oil.

Finally, I will teach you some precautions in choosing edible oil.

In view of the price and raw materials, if there is no shortage of money, try to choose big supermarket brands to squeeze edible oil. If you can control the processing of raw materials and understand the technology of oil press, you can choose to press oil yourself, without counterfeiting or adding bad additives. In addition, when choosing edible oil in the supermarket, you should also pay attention to the following points:

First, you can't buy edible oil without vitamin E content.

These words are not on the oil drum, so we can't buy them anyway. Inferior oil is very harmful to our health. We can go and have a look. Most oils contain vitamin e in addition to fat. If it's just fat, it's spoiled cooking oil, which is very harmful to our health.

Second, blending oil can't be bought.

Blending oil is cheap and is loved by some people. Eating too much is harmful to our health. Blending oil is a mixture of many oils, and you don't know which ones are added. As some experts on the internet said, people should not always eat one kind of oil, but can eat it together, which is good for their health. But matching doesn't mean you bought blended oil. You can buy several kinds of oil at home and eat it yourself.

Third, the outer packaging can't be bought without the food standard number GB/T.

GB stands for meeting national standards. If there is no national standard, it is all inferior oil produced by small workshops.

To sum up, edible oil is an indispensable commodity in life. We should not be careless in choosing health. Keep your eyes open for some oils produced by small black-hearted workshops that cannot guarantee the source of raw materials. Because there are some small moves in the process of oil extraction in individual oil mills, or the process is unqualified, there is no monitoring standard and professional organization constraints, food safety can not be guaranteed. I suggest you choose regular channels and big brands to extract oil.