On the way, I met Zhang Bo, a neighbor. When Zhang Bo heard that she was squeezing oil herself, she advised her: "Sister, I heard that this self-squeezing oil is not safe. It seems that there is that aflatoxin, which is a first-class carcinogen, and it is easy to get cancer after eating it! Don't be greedy for this cheap. "
Aunt Li defended: "No way? I think that shop is quite clean, it is squeezed and sold now, and it is very fresh. How can there be carcinogens? Don't scare me. “
Aflatoxin is a highly toxic carcinogen and a metabolite of Aspergillus flavus. Only 20mg of aflatoxin can directly lead to the poisoning death of an adult, and the fastest carcinogenesis takes only 24 hours. Even more frightening is that the toxicity of aflatoxin is difficult to be eliminated, and it is possible to inactivate it at a high temperature above 280℃.
Aflatoxin may exist in many places in daily life, such as chopping boards, pots and pans that have not been cleaned or disinfected; Moldy food, such as moldy nuts, oils and grains; Deteriorated leftovers are medium. Therefore, we must pay attention to the cleanliness of the kitchen and kitchen utensils in our daily life, throw away all moldy food decisively, and don't buy cooking oil from informal channels.
Some people like to squeeze oil by themselves, or buy oil from small workshops in the market, thinking that this kind of oil is more natural and therefore healthier without adding. As everyone knows, this kind of oil is more serious and even fatal to health.
On the one hand, self-pressed oil and soil-pressed oil do not adopt refining process, and the squeezed oil has many impurities, which is not suitable for storage and is more prone to deterioration.
On the other hand, the raw materials used in self-pressing oil and soil-pressing oil may not be strictly selected, and they may be mixed with moldy raw materials. Naturally, the pressed oil is easy to exceed the standard of aflatoxin, and these oils are sold on the market without quarantine, and their safety is even less guaranteed.
As mentioned earlier, there are great security risks in raw materials, technology and storage of self-squeezed oil, so it is necessary to start from these aspects to minimize the risks.
First of all, I suggest that you don't buy earth-pressed oil in the market, because the whole production process can't be controlled. If you want to eat self-pressed oil, it is better to buy raw materials yourself.
In the first step, the raw materials must be well controlled, and the moldy oil must be discarded, otherwise the squeezed oil will be contaminated by aflatoxin, which will have a great impact on health after eating.
In the second step, we should control the output when squeezing oil, because there are many impurities in self-squeezed oil and it is difficult to remove, so it is not suitable for long-term storage. Therefore, it is best to squeeze less oil every time, not more than two weeks, and then squeeze a new one after eating.
In the third step, it is best to store the self-squeezed oil in a clean and dry sealed glass pot, and place it in a place where there is no direct sunlight and the temperature is low, so as not to accelerate the deterioration of the self-squeezed oil. When eating, you should also pay attention to whether the color and smell of the oil are abnormal. Once it is found to be deteriorated, it can no longer be eaten, and the utensils in full bloom should be cleaned to hold new oil.
-animal oil
Many people like to use lard to stir-fry and think it tastes better. Incense is fragrance, but frequent consumption of animal oil may bring health problems. Because the saturated fatty acid content in animal oil is as high as 40%, which is three times that of vegetable oil.
Saturated fatty acids are more difficult to metabolize than unsaturated fatty acids, and it is easy to cause cholesterol to deposit on the blood vessel wall. People who regularly eat animal oil are more likely to have obesity, cardiovascular diseases and other problems.
According to the dietary guidelines of China residents, the daily intake of saturated fatty acids by adults should not exceed 10% of the total calories. After deducting the saturated fatty acids in the meat, eggs, milk, cakes and other foods we eat every day, there is actually no room left for animal oil, so it is ok to add some animal oil occasionally to enhance the flavor. It is recommended not to eat it for a long time.
-waste oil
The notoriety of gutter oil is well known, and its raw materials are usually grease from swill, cheap deteriorated lard or kitchen surplus oil that seems to be used many times. The oil made from such raw materials not only has significantly exceeded the standard of bacteria and microorganisms, but also contains a large number of carcinogens such as aflatoxin and benzopyrene. Many people have gastrointestinal reactions such as abdominal pain, diarrhea and even dizziness and fatigue immediately after eating waste oil by mistake. In short, it's terrible.
To buy edible oil, it is suggested to buy products produced by regular manufacturers, especially big-name manufacturers, from formal channels. These products have strict quality inspection and supervision, and their safety is higher.
Secondly, the fatty acid composition of each oil is different, so it is necessary to change the types of edible oil frequently, sometimes buying corn oil, sometimes buying sunflower oil, sometimes buying soybean oil, etc. If you only eat one oil for a long time, the fatty acid intake is easy to be unbalanced, which may cause nutritional deficiency.
Third, choose oil according to different cooking methods. The smoke point of different oils is different, and the oil with low smoke point is even less resistant to high temperature. If it is used in high temperature cooking, it will easily produce a lot of soot and release a lot of harmful substances. Common oils with high smoke point suitable for cooking include soybean oil, corn oil, sunflower oil and peanut oil, while oils with low smoke point include olive oil, tea seed oil and sesame oil, which are more suitable for cold salad.
Finally, when buying edible oil, the reserves should also be considered. Many people like to hoard barrels of oil while it is cheap. However, once the oil is opened, it is easy to oxidize, and it is more likely to deteriorate if it is stored improperly. Therefore, if the family has a small population, it is not recommended to buy large barrels of cooking oil. The longer you eat it, the more unsafe it is. If you must hoard it, try to hoard small bottles of sealed oil, and use up one bottle before opening a new one.
Using oil is almost a daily thing for every household. If the oil used is not good, it will affect the health of the whole family. We must have a good understanding of how to buy and use oil safely. # Breeze Project ##39 Healthy Super Group #