Since April, many domestic media, especially those in provincial capitals and prefecture-level cities, have published and reprinted an article entitled "Don't ignore the harm of microwave ovens", which has been reprinted by various websites. According to incomplete statistics, there are as many as 530 articles in * * *. The article says that "using microwave oven is harmful to human body, and the food cooked by microwave oven will lose its nutrition", which makes many consumers afraid to buy and use microwave oven, thus causing the sales of microwave oven to be frustrated. Compared with the same period of last year, the sales volume of the whole industry decreased by about 40%.
According to Don't Ignore the Harm of Microwave Oven, "Although the microwave oven is fast, few people know its harmfulness: staying near the microwave oven for a long time will lead to a slow heartbeat; After a day's work, you will feel pain all over, sleep will be disturbed, and your memory will decline; In addition, the damage of microwave oven to food is terrible. Foods that have been' cooked' or thawed only once have no active vitamins, and only a few calories remain in the stomach. Therefore, people can't often use microwave ovens for convenience. "
The article "Harm" said that the microwave oven, once listed as one of the great inventions of the 20th century, seems to be a "terrorist killer" for human health. What is the truth? Zhang Tieyan, vice president of China Household Electrical Appliances Research Institute, said: The safety of microwave ovens has a long history. The safety of microwave ovens has national standards, and it is a mandatory national standard equivalent to international standards. At present, the domestic and international standard of microwave oven leakage is no more than 5 milliwatts per square centimeter, and the standard test method is the same as the international standard. According to the domestic tests in recent years, the radiation of domestic microwave ovens is generally below 1 MW and 0.5 MW. Therefore, the microwave ovens sold in the domestic market are safe household appliances and will not cause any harm to human health, so consumers can use them with confidence.
According to Professor He, a food hygiene expert, the loss rate of vitamin C in Chinese cabbage cooked by microwave oven is 4.76%, while the loss rate caused by traditional cooking methods is 19.04%. In addition, the existence rate of minerals and amino acids in food is much higher than that in other cooking methods. If the hoof is cooked in microwave oven, the eight essential amino acids are 98.6% of those before microwave heating. Because the heat is inside the food, it is heated evenly, without frying, and there will be no endogenous phenomenon of external coke.
According to experts from the Chinese Preventive Medicine Association, Adel, a professor of physics at the University of Wisconsin in the United States, has been studying the effects of microwave radiation on small animals and humans for more than 25 years. She experimented with animals and humans in the microwave oven. Therefore, animals are very excited in the microwave room, while human beings feel similar to enjoying the bright sunshine. She explained that although microwaves belong to the same kind of radiation as X-rays and gamma rays, their quantum energy is different by millions of times. She pointed out that the only way for microwave to kill cells is to make them "die of heat", and the radiation leaked by microwave ovens can't reach such a level.
In this way, the microwave oven will not endanger human health.
Regarding whether heating milk in microwave oven will destroy the nutrition of milk, Professor Song pointed out that the key problem lies in the length of heating time. Because the heating speed of the microwave oven is extremely fast, and the temperature required for milk cannot be too high. If you use a stove, it is usually 70 degrees for 3 minutes and 60 degrees for 6 minutes. Then use the microwave oven 1 minute or so.
Researcher, Institute of Biophysics, Chinese Academy of Sciences
Radiation biology expert
Grace
Whether the food processed by microwave oven is harmful to human body is still lack of convincing evidence, so it is difficult to draw a hasty conclusion. It is ok for many people to pay attention to the use of microwave ovens, but it is obviously premature to say that "microwave food is harmful to human body" before strict scientific experiments, and the general conclusion that "microwave ovens can't be used" will also bring unnecessary confusion.
Deputy Director of China Household Electrical Appliances Research Institute,
National Household Electrical Appliances Quality Supervision, Inspection and Testing Center
Deputy Director of Laboratory of Import and Export Household Appliances Accreditation Center of State Commodity Inspection Bureau.
Zhang tieyan
When the microwave oven works, it produces even less radiation than ordinary fluorescent lamps. At present, the international standard of microwave leakage of microwave ovens is no more than 5 milliwatts per square centimeter, which will not endanger people's health. For any household appliances, the country has corresponding laws and regulations to ensure that the products meet the standards, and the detection indicators of microwave ovens in China will be better than international indicators. Therefore, according to the test results, domestic microwave ovens are completely safe, and there is no scientific basis for the "harmful theory of microwave ovens".
Deputy Secretary General of China Household Electrical Appliances Association
Chen gang
People don't have to worry that the microwave leakage of the microwave oven will cause harm to the human body. Because the international standard strictly stipulates that the microwave leakage of microwave ovens should not exceed 5 milliwatts per square centimeter, some famous microwave oven manufacturers in China have adopted multiple leak-proof technologies and have controlled the microwave leakage below 0 milliwatts per square centimeter/kloc-0. The radiation produced by microwave oven is even less than that of ordinary fluorescent lamp, which will not do any harm to people's health.
Biology of electromagnetic radiation of Chinese Physical Society
Member of professional committee, doctor of medicine.
Ding Zhenhua
Generally speaking, I don't think this article (Raymond Francis's article on the harm of using microwave ovens to human health) is credible. The whole paper is general, and there is no theoretical and experimental basis related to pathology, toxicology and physiology. Such articles are neither rigorous academic papers nor convincing popular science articles. Because although popular science articles express profound scientific theoretical knowledge in simple and plain words, they still have scientific basis, and there is basically no science in Lei Wen.
Deputy Secretary General, Institute of Nutrition, China Center for Disease Control and Prevention.
Director of food nutrition evaluation room and doctoral supervisor of food safety research institute
Yang Yuexin
Theoretically, microwave heating will not cause 60% ~ 90% nutritional loss of food. Because compared with other traditional cooking methods, the heating time of microwave oven is usually very short. Although microwave promotes molecular movement, it will not decompose too much in a short time. Relatively speaking, traditional cooking methods, such as frying, boiling, frying and baking, have more serious damage to the nutrients in food than microwave heating. The loss of water-soluble vitamin B 1 and riboflavin in the process of making the most common rice, steamed bread and porridge rich in flour can reach about 80% and 40% ~ 50%. When cooking, the loss of vitamin C in spinach is about 20%, and that in Chinese cabbage is about 40%, and this loss is more in high-pressure canned food.
China Preventive Medicine Association
Relevant experts
Microwave is a kind of high-frequency wave, which changes at a speed of 2.4 billion times per second, making water molecules move at high speed and rub against each other to generate heat, thus heating and cooking food without destroying food nutrition. The data of food hygiene supervision department also showed that the loss rate of vitamin C in Chinese cabbage cooked by microwave oven was 4.76%, while that of traditional cooking method was 19.04%. "Microwave cooking destroys food nutrition" is sheer nonsense.
(The above news is taken from Xinhua News Agency)
Researcher, Institute of Biophysics, Chinese Academy of Sciences
Radiation biology expert
Grace
Whether the food processed by microwave oven is harmful to human body is still lack of convincing evidence, so it is difficult to draw a hasty conclusion. It is ok for many people to pay attention to the use of microwave ovens, but it is obviously premature to say that "microwave food is harmful to human body" before strict scientific experiments, and the general conclusion that "microwave ovens can't be used" will also bring unnecessary confusion.
Deputy Director of China Household Electrical Appliances Research Institute,
National Household Electrical Appliances Quality Supervision, Inspection and Testing Center
Deputy Director of Laboratory of Import and Export Household Appliances Accreditation Center of State Commodity Inspection Bureau.
Zhang tieyan
When the microwave oven works, it produces even less radiation than ordinary fluorescent lamps. At present, the international standard of microwave leakage of microwave ovens is no more than 5 milliwatts per square centimeter, which will not endanger people's health. For any household appliances, the country has corresponding laws and regulations to ensure that the products meet the standards, and the detection indicators of microwave ovens in China will be better than international indicators. Therefore, according to the test results, domestic microwave ovens are completely safe, and there is no scientific basis for the "harmful theory of microwave ovens".
Deputy Secretary General of China Household Electrical Appliances Association
Chen gang
People don't have to worry that the microwave leakage of the microwave oven will cause harm to the human body. Because the international standard strictly stipulates that the microwave leakage of microwave ovens should not exceed 5 milliwatts per square centimeter, some famous microwave oven manufacturers in China have adopted multiple leak-proof technologies and have controlled the microwave leakage below 0 milliwatts per square centimeter/kloc-0. The radiation produced by microwave oven is even less than that of ordinary fluorescent lamp, which will not do any harm to people's health.
Biology of electromagnetic radiation of Chinese Physical Society
Member of professional committee, doctor of medicine.
Ding Zhenhua
Generally speaking, I don't think this article (Raymond Francis's article on the harm of using microwave ovens to human health) is credible. The whole paper is general, and there is no theoretical and experimental basis related to pathology, toxicology and physiology. Such articles are neither rigorous academic papers nor convincing popular science articles. Because although popular science articles express profound scientific theoretical knowledge in simple and plain words, they still have scientific basis, and there is basically no science in Lei Wen.
Deputy Secretary General, Institute of Nutrition, China Center for Disease Control and Prevention.
Director of food nutrition evaluation room and doctoral supervisor of food safety research institute
Yang Yuexin
Theoretically, microwave heating will not cause 60% ~ 90% nutritional loss of food. Because compared with other traditional cooking methods, the heating time of microwave oven is usually very short. Although microwave promotes molecular movement, it will not decompose too much in a short time. Relatively speaking, traditional cooking methods, such as frying, boiling, frying and baking, have more serious damage to the nutrients in food than microwave heating. The loss of water-soluble vitamin B 1 and riboflavin in the process of making the most common rice, steamed bread and porridge rich in flour can reach about 80% and 40% ~ 50%. When cooking, the loss of vitamin C in spinach is about 20%, and that in Chinese cabbage is about 40%, and this loss is more in high-pressure canned food.
China Preventive Medicine Association
Relevant experts
Microwave is a kind of high-frequency wave, which changes at a speed of 2.4 billion times per second, making water molecules move at high speed and rub against each other to generate heat, thus heating and cooking food without destroying food nutrition. The data of food hygiene supervision department also showed that the loss rate of vitamin C in Chinese cabbage cooked by microwave oven was 4.76%, while that of traditional cooking method was 19.04%. "Microwave cooking destroys food nutrition" is sheer nonsense.
(The above news is taken from Xinhua News Agency)