Recently, a fan asked in a private message: Does rapeseed oil really cause cancer? By the way, a supporting article of the "experimental report" was attached, and I was shocked after reading Xiaojiuda.
In the impression of many people, rapeseed oil has always been a healthy edible oil, why is it suddenly carcinogenic? Is even rapeseed oil unhealthy now?
1. Eating rapeseed oil regularly is not only harmful to the body, but also may cause cancer?
Rapeseed oil is also one of the main edible oils in the mainland, which is not uncommon in daily life, and the raw material is rapeseed, which is known as "Oriental olive oil".
But in recent years, various negative rumors about rapeseed oil have emerged, and the most widely rumored is the carcinogenic problem.
If you want to trace the source, you have to talk about erucic acid in rapeseed oil, which is indeed harmful to the human body, and the content in rapeseed oil is about 31%-55%.
Animal experiments have proved that a large intake of foods high in erucic acid can cause a series of problems such as myocardial lesions, thickening of blood vessel walls and myocardial fat deposition, stunted growth or retardation.
However, there have been some animal experiments on "myocardial lipid deposition" caused by erucic acid, which can be reversed after stopping dietary feeding with high erucic acid.
As for the rumor that erucic acid will cause cancer after eating, because neither animal experiments nor other studies can directly prove that "erucic acid causes cancer", because cancer itself is the result of complex causes, and the theory of rapeseed oil carcinogenicity still needs to be viewed objectively and rationally.
According to the mainland's edible oil regulations in 2004, the safety content standard of erucic acid in rapeseed oil is less than 3%, so as long as the purchase channel is regular, it can generally be eaten with confidence.
2. Carcinogens were detected in nearly 60% of edible oil samples, and three indicators should be paid attention to
Previously, because the Hong Kong SAR Consumer Council conducted a sample survey of nearly 50 edible oils, it was found that 60% of them had a genetic carcinogen - propylene oxide alcohol, and 2 of them even exceeded the EU standard.
The safety of edible oil has always been the topic of most concern to the public, as a daily necessities for every household, how to ensure the safety of edible oil? Experts remind that the purchase of edible oil should pay attention to three indicators:
1. Acid value
In fact, it refers to the proportion of free fatty acid content in unit mass edible oil. High acid value means that the edible oil is of poor quality or improper storage, resulting in oxidation or contamination, which can seriously cause gastrointestinal discomfort and other digestive problems.
2. Benzopyrene
Benzopyrene is the most common in smoked and grilled products, but it can also be contained in poor-quality cooking oil or improperly processed contaminated cooking oil, which may be teratogenic and carcinogenic if ingested for a long time.
3. Aflatoxin
Aflatoxin is highly carcinogenic, and long-term intake has the greatest loss to the liver, which can cause liver cancer in severe cases, and most of this substance is found in edible oil that is not processed properly or stored for too long.
3. Reminder again: If there are 3 kinds of cooking oil in the kitchen, don't eat them
In fact, compared with canola oil, the following 3 oils are the real health threat, if you have it in your kitchen, throw it away.
1. Self-pressed oil in small workshops
The self-extraction of oil in small workshops cannot ensure the safety of raw materials, equipment, and environmental health, and the lack of supervision of processing steps makes it easy for harmful substances to exceed the standard.
2. Rancia oil
After the edible oil is opened, if it is not used up for a long time, the remaining oil may be hydrolyzed or oxidized and rancid. Long-term intake of rancid oil may cause a series of adverse reactions such as abdominal pain and diarrhea, and even have the risk of tumor and cardiovascular disease.
3. Oil that has been fried repeatedly
Many families like to save the fried oil and continue to use it, but in fact, there are a lot of benzopyrene in this oil, and the process of continuing to eat it will also bring benzopyrene back into the human body, which also indirectly increases the risk of cancer.
Fourth, edible oil also has a time when it is "wronged", tell you the truth
There have been endless health problems about edible oil, among which it is difficult to distinguish between true and false, and even some are complete rumors, you must have heard the following two statements.
1. Is GMO oil risky?
As a mature genetic engineering technology, the main principle of transgenic is to isolate the excellent genes of one organism and transfer them to another organism, so that crops can have higher quality.
Some people worry that genetically modified ingredients will affect human health, but in fact, there are no studies to confirm that genetically modified foods have health risks, so this claim is not scientific.
2. Is there any chemical residue in the leached oil, which is harmful to the human body?
In fact, leaching oil is a physical pressing method for extracting oils and fats more efficiently by using food-grade solvents, and it has quickly become the mainstream processing method of edible oil because of its low production cost.
At present, this process can reach the point where the solvent residue is almost no longer left after leaching, so as long as it meets the safety production standards and standardizes the production of leaching oil, it can be eaten with confidence.
In fact, the source of edible oil is regular, properly preserved, the basic health risk is not as big as the rumors, the daily use of oil should not be excessively affected by the so-called rumors, after all, oil is also a nutrient needed by our human body, as long as it is eaten according to the rules, it will not cause serious harm to the body.
Resources:
[1] "Experts Say | This stir-fry necessity, using it incorrectly is too harmful to health". Life Times.2023-10-13.
[2] "Toxic and Carcinogenic! Tell your parents not to use this oil to stir-fry again, the harm is really not small! 》. Health Times.2024-01-24.
[3] "This oil is easy to cause cancer, but many families still use it to stir-fry →". People's Daily.2024-01-24.
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