"Is your home still using this kind of electric kettle made of high-manganese steel? Stop it immediately. Drinking water with this pot will make you stupid and carcinogenic!" Recently, such a message was passed down in the circle of friends and Weibo. Because of the close relationship with daily life, many netizens expressed concern after seeing the post. So, is this statement reliable? In this regard, the reporter conducted an investigation.
Net transmission: using high-manganese steel pot to boil water can make people become silly and even carcinogenic
This post reads: "Beware! Drinking water with this pot will make people stupid and even carcinogenic, because most of the stainless steel electric kettles on the market are made of high-manganese steel. During the heating process of boiling water, a large amount of heavy metal manganese will be precipitated. After ingestion, the human body will affect the function of the nervous system, causing memory loss, lack of energy and other symptoms. In the long run, it will even increase the incidence of cancer. Not afraid!†In the post, the “2016 Electric Kettle Product Risk Monitoring Quality Analysis Report†issued by the Jiangsu Provincial Quality Supervision Bureau was attached. It also mentioned that the electric kettle of high manganese steel material on the market today More than half of it, and after testing, does precipitate heavy metals. If the human body excessively ingests manganese metal for a long time, it will affect the function of the nervous system, causing symptoms such as lethargy, memory loss, and neurological disorders.
After seeing the post, many netizens forwarded the message and expressed concern. Some netizens also commented: "I don't dare to use the electric kettle at home to boil water!" Some netizens said they have not dared to drink outside!
expert
The amount of manganese precipitated when the kettle is boiled is much lower than the human tolerance.
So, is this statement really correct? In this regard, Niu Congshuai, a chemistry teacher at Shijiazhuang No. 1 Middle School, said that he also read the "2016 Electric Kettle Product Risk Monitoring Quality Analysis Report" issued by the Jiangsu Provincial Quality Supervision Bureau. He pointed out that at the time, the Jiangsu Provincial Quality Supervision Bureau chose not to use water, but 4% acetic acid food simulant, so the measured data would be slightly larger than that measured by water.
However, even in this test method, the maximum amount of manganese extracted from high-manganese steel is only 1.168 mg per liter, and one person drinks an average of 1 to 2 liters of water a day. In this case, the intake of manganese is only To 3mg. According to the "Chinese Dietary Nutrient Reference Intake" standard, the maximum tolerable intake of manganese per day for adults is 11 mg. Therefore, Niu Congshuai said that as long as the daily use of electric kettle products in accordance with national standards is boiled, it will not cause any damage to the human body.
Doctors
Manganese is originally a trace element required by the human body.
In this regard, Lei Min, a doctor in the Department of Nutrition and Medications of the Third Hospital of Hebei Medical University, also said that in fact, manganese is originally a trace element needed by the human body, and its main role for the human body is as a component of human enzymes. It is also a component of connective tissue, bones, blood clotting factors, sex hormones, etc. It is indispensable for fat and carbohydrate metabolism, calcium absorption, blood sugar regulation, etc. Normal brain and nerve function are also inseparable from its participation.
Moreover, according to the previous National Food Safety Risk Assessment Center, the main route of manganese intake is respiratory, and the absorption rate of manganese in the gastrointestinal tract is only 1%-5%. Currently, it has not been found in the clinic because of dietary intake. , a case of manganese poisoning. Therefore, under normal circumstances, high manganese steel cookware does not cause "manganese" poisoning.
Reporter's notes
I have to say that this is a network rumor with a high "technical content". First of all, the rumor added the actual symptoms of manganese poisoning, followed by the test report of the relevant departments as evidence, plus the electric kettle is a very common electrical appliance in the home. Seeing such an authoritative and professional statement, the average person will inevitably have the idea of ​​"being credible, not credible."
In fact, the rumor is out of context, only intercepts the part that is beneficial to you, and deliberately ignores the most important intake! But if you do not have professional knowledge, it is really difficult to distinguish between true and false. In order to break through similar rumors, relevant departments and scientific research institutions should bear the brunt of it. Only by promptly refuting it with scientific arguments can we completely eliminate rumors.
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