China is the world's largest consumer of edible vegetable oil, in 2018, China's consumption of edible oil reached 37.67 million tons, China has many brands of edible oil, and there are many brands of edible oil, but it has been checked to contain carcinogenic ingredients.
Recently, the country and also various provinces have conducted sampling of cooking oil, many batches were found to contain carcinogenic ingredients, resulting in unqualified exceedances of mostly aflatoxin, benzo(a)pyrene, acid value, peroxide value, and solvent residues of these five kinds. From the published results, China's cooking oil sampling failure rate average data in 1.1% or so, in other words, 100 oil companies will have 1.1 companies produce cooking oil is unqualified.
The acid price mainly reflects the degree of rancidity of fats and oils in food. The reason why the acid price exceeds the standard may be related to the enterprise raw material procurement is not strict, the production process is not up to standard or improper product storage conditions, especially when the storage temperature is high, it is easy to lead to the oxidation of the fat in the food rancidity caused by the acid price exceeds the standard. Acid price exceeds the standard food will have a taste of haram, exceeding the standard serious aldehydes, ketones, acids will destroy fat-soluble vitamins, consumption may lead to gastrointestinal discomfort, diarrhea and damage to the liver.
The peroxide value mainly reflects whether the oils and fats in the food are oxidized and rancid. Solvent residue is a harmful substance only caused by using leaching process. Solvent residues are a common mandatory quality indicator in edible vegetable oil quality standards.
The most harmful of these are aflatoxins, benzo(a)pyrene, and banned flavor enhancers. Aflatoxin (Aflatoxin, AF) is mainly the metabolites of Aspergillus flavus and Aspergillus parasiticus, aflatoxin is the most toxic and carcinogenic mycotoxin found to date, has long been classified by the World Health Organization (WHO) as a class I carcinogen.
Aflatoxin general cooking process can not be destroyed, even with a temperature of 100 for 20 hours of sterilization, but also may not be able to completely remove it. Yellow
Aflatoxin main hazardous parts of the liver, aflatoxin physicochemical properties are quite stable, in the body can not be degraded, can only be deposited in the liver cells. When the amount of aflatoxin deposition exceeds the body's tolerance, it will cause liver damage, and even induce liver cancer.
In addition to carcinogenicity and mutagenicity, aflatoxins also reduce immunity. A lot of epidemiological data show that hepatitis B patients, hepatitis B virus carriers are more likely to develop liver cancer than healthy people exposed to aflatoxins - and our country is the hardest hit by hepatitis B.
Benzothiophene and its toxins can cause liver damage and even induce liver cancer.
Benzo(a)pyrene is a byproduct of daily life or industrial production, and is the most toxic of the PAHs, a strong carcinogen. The Japanese have experimented with it on rabbits. The experiment showed that the benzopyrene coated in the ears of rabbits, coated to the 40th day, the rabbits on the ears will grow a tumor.
And some edible oil companies in order to attract consumers, to improve the flavor of vegetable oils, products to add banned spices, such as ethyl maltol, excessive consumption of human liver has an impact on the bones and joints in advance of brittle cancer and other diseases. Serious may also lead to headaches, nausea, vomiting, breathing difficulties, and even able to damage the liver and kidneys, a greater harm to the human body.
The exposure of many "problem oil" are some small factories, small workshops of the brand, such as Doritos edible vegetable oil, Doritos Zhenbao edible vegetable oil, Hunan Hongkang oil production of wild camellia oil and so on. These are brands of cooking oil that are hard to find in supermarkets.
1, many people think that the small workshop is natural, like to buy the oil of the small workshop, the conditions of the small workshop to store the raw materials are not safe, and the processing may also be negligent.
2, when buying cooking oil to carefully check their trademarks, pay special attention to the shelf life and factory date, no factory name, no factory address, no reference to the quality standard code must pay special attention to, do not just buy. We still try to choose the regular supermarkets in the big brands of fats and oils, so that people feel more at ease.
3, according to the relevant national standards, most edible oils are generally in accordance with the quality from high to low, can be divided into one, two, three, four. The higher the grade, the more refined the cooking oil, the better the quality.
4, generally high grade cooking oil color light, low grade cooking oil color dark (except fragrance oil). The oil will be heated to 150 Pour out, if it is a high-quality cooking oil should be no precipitation, otherwise there are impurities. In addition, if there is layering, it may be adulterated mixed oil.
5, the purchase of cooking oil preferred physical pressing, because the physical press no chemical residues, the current relatively high security;
6, good quality oil, saturated fatty acids, monounsaturated fatty acids, polyunsaturated fatty acids, the ratio of 1 1 1. Regular manufacturers will generally be in the cooking oil packaging labeled with the content of these three fatty acids and the ratio.
When we buy cooking oil, we must be careful to choose, do not want to be cheap, as a daily necessity, we should try to consume high-quality cooking oil, so as to meet the human body's nutritional needs.