In the era of severe material scarcity, it is quite satisfying to be able to eat a spoonful of lard, and now that everyone's living conditions are better, the main healthy and safe vegetable oil has gradually replaced the lard of the past. Peanut oil, soybean oil, corn oil, olive oil..... And so on, a variety of cooking oils make people dizzy, do not know which one to choose is suitable for themselves.
However, the "soybean oil" that has always been praised as a healthy edible oil is actually not healthy, circulating on the Internet: "Soybean oil is synthesized with chemical solvents, even if it really comes from soybeans, it is genetically modified or extracted by chemical methods, and long-term eating is not conducive to health!"
Are these claims circulating online true? Today, Dr. Yang will take you to discuss this issue together.
First, does soybean oil really contain unhealthy substances?
Soybean oil, as the name suggests, is the vegetable oil extracted from soybeans, and now the common extraction methods are mainly two, one is the physical pressing method, the second is the use of chemical leaching method, the two ways of taking oil have their own advantages and disadvantages. The physical pressing method is to directly squeeze the oil in the soybean, the method is relatively rude, the oil yield is not high, and it is easy to participate in impurities. The advantage is that there is no additive, and everyone will feel more natural.
The chemical leaching method, with its high oil yield, can also effectively remove impurities in soybean oil, but this extraction method is not accepted by the public. Many people as long as they hear the word "chemical" will inevitably associate with chemical solvents, in fact, extract soybean oil to add some organic solvents, but this is only to improve the oil yield, in the follow-up process will also go through the "six removal" process, that is, degreasing, degumming, dehydration, decolorization, deodorization, deacidification and other processes to filter out the impurities in soybean oil. The last thing left is the real soybean oil, which is actually purer and healthier to eat than the physical pressing method.
The statement that soybean oil is unhealthy mainly stems from a paper published in the foreign journal "Endocrinology", which pointed out that soybean oil contains trans fatty acids, which will increase the risk of obesity and diabetes, and will also affect nervous system diseases, induce autism, Alzheimer's disease, depression and so on. As soon as the remarks were published, it caused a sensation around the world, many scholars began to really understand soybean oil, and institutions led by the US Department of Agriculture began to formally understand soybean oil. Soybean oil, which is 100g in the agricultural part of the United States, contains 0.533g of trans fatty acids. In fact, trans fatty acids are not limited to soybean oil, most of the cakes, biscuits, fries and other foods that everyone eats outside are actually made of oil containing trans fatty acids, because trans fatty acids are low in cost and easy to preserve. Soybean oil will only crack a small amount of trans fatty acids after heating during the production process, which can be completely ignored.
The World Health Organization clearly states that the safe limit of the human body's daily intake of trans fatty acids is 2.5g, but in fact, normal people can take in 30g of soybean oil per day is already the limit, and the trans fatty acids ingested under this limit are only 0.16g. This amount is completely safe, so it can be seen that saying that soybean oil is unhealthy is completely a rumor.
On the contrary, soybean oil also contains a variety of phospholipids, β-carotene, vitamin E, vitamin D, lecithin, linolenic acid and other components, which are essential nutrients for the human body.
Second, for the sake of health, these 2 kinds of oils should indeed be eaten less!
1. Animal oil
The most common animal oil in daily life is mainly the fat of pigs, cattle, sheep and other animals, and in the previous years of serious material scarcity, being able to eat animal oil is a good standard for family conditions. Why is it that now that the conditions are better, it is not recommended to eat animal oil?
The reason is that animal oils are mainly saturated fatty acids, which are a major source of increased risk of triple hyperemia, which can be deposited with intravascular pairs that cause a variety of cardiovascular diseases due to hardening of the arteries.
Some friends will still ask, why were people at that time eating okay, but we are now eating yes? In fact, it is a shame to say, Dr. Yang is also from the countryside, before the experience of eating lard is really not easy to come by, said ridiculous words is afraid of intestines rust before hurrying to hang a little, usually almost rarely eat. Do you say this hardens blood vessels? On the contrary, now everyone is in good condition, every day big fish and big meat, this saturated fatty acid is almost all over-intake, eating too much will naturally be detrimental to health.
2. Soil method self-pressed oil
Soil method self-pressed oil refers to the most primitive physical pressing method, see here everyone may object, this obviously does not have any additives, so-called pure natural oil pressing method why is it unhealthy?
In fact, everyone only knows the physical pressing method, but everyone ignores the process of oil pressing in many oil mills. Some small workshops are very worried about hygiene, and secondly, self-pressed oil may be mixed with a lot of impurities due to the preservation or transportation of raw materials, such as mold, aflatoxin, water, phospholipids, proteins, free fatty acids, pigments, heavy metals, etc. There is also the fact that self-pressed oil will inevitably cause many problems because it has not undergone a special method to separate the harmful substances inside. For example, self-pressed oil may contain glucosinolates and erucic acid. Long-term consumption of this oil containing glucosinolates and erucic acid may increase the risk of cardiovascular disease and may also affect fertility.
Therefore, it is recommended that you should eat less oil pressing oil, if you must eat, please pay as much attention as possible to the health of the oil pressing and the oil pressing link, and reduce the breeding and incorporation of harmful substances.
Resources:
[1] What oil is the unhealthiest? Soybean oil? Doctors remind: these 3 kinds of oils should be eaten less or not" The doctor's kind words, 2022-01-13
[2] What is the most unhealthy oil? Is it soybean oil? These 3 types of oils should not be eaten as much as possible", Dr. Dr, 2021-11-04
[3] Soybean oil is nominated as "unhealthy cooking oil", are you still eating it? In fact, it is not so terrible" 39 Health Network, 2021-06-22
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