Tip: How dangerous is "manganese exceeding the standard" In tableware?

How dangerous is "manganese" In tableware?
Cloud unintentional 16:30:54

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Supor's stainless steel tableware "manganese content exceeds the national standard 4 times", so must be "harmful?
 
Supor stainless steel pot, picture from http://news.xmnn.cn/gnxw/201202/t20120218_2184902.htm
The "manganese exceeding" in stainless steel tableware is an old news, just because the recent CCTV's first program attracted a lot of attention. Some people claim that "manganese exceeding the threshold of 4 times" will lead to Parkinson's Disease ", not surprisingly caused a lot of panic. Some people even claim that they can only use plastic tableware ...... Not to mention more opportunities for Plastic Tableware to "exceed the limit", but plastic tableware cannot be used for frying or frying. Most people have to continue using metal tableware. How dangerous is manganese in stainless steel tableware?

Manganese, less is insufficient, more is harmful
For humans, manganese is similar to iron. Most people know that iron is essential to human body trace elements. The lack of iron can lead to a series of symptoms, such as lethargy, weakness, anemia, etc. Excessive iron can cause iron poisoning. According to estimates by WHO, there are many people in the world with iron deficiency, so iron is even promoted as a public health service. "Iron pan cooking" is considered by many people as one of the ways to "make up iron", but some experts say that there are very few iron sources entering the iron pan, the effect of iron supplementation for "iron pan cooking" can be ignored.

Manganese is similar. First, manganese is essential to human body trace elements. It is a component of various components, such as condensed tissue, skeleton, coagulation factor, sex hormones, etc. It is also indispensable for fat and carbohydrate metabolism, calcium absorption, blood sugar adjustment, and so on. Normal brain and nerve functions cannot be separated from its participation. Insufficient manganese may affect nerve development.

As with many mineral nutrients, excessive manganese may also harm the human body. Excessive Manganese will inhibit iron absorption, and long-term excess will affect the function of the nervous system-the news tells the public that "excessive manganese may lead to Parkinson's Disease" is not out of stock.

But the old saying goes: "All the roles and dangers that leave the dose talk are hooligans ." How much manganese does the human body need every day? How much manganese can the human body bear? Scientific data is not very uniform. Different countries in the world have different interpretations and different standards are recommended. For example, for adults, the "adequate amount" in the United States is 2-3 mg per day, China is 3.5 mg, and Canada is higher. This "sufficient amount" means that eating so much every day is enough to meet your needs. It does not mean that it is harmful if it exceeds the limit. The "maximum intake" is considered safe if it is not exceeded, and the risk increases if it is exceeded-the standards set by China and the United States are about 10 mg per day.

Manganese exists in water, air, soil, and food. The main way for ordinary people to take manganese is food. The population's manganese intake varies by country, generally several mg. That is to say, ordinary people do not have "Manganese Deficiency", and there is still a considerable distance from "Safe uptake limit.

The true meaning of "manganese exceeding the standard" of stainless steel tableware
The news revealed that supor's stainless steel tableware was not made of qualified materials, emphasizing that "manganese content exceeds the national standard 4 times", so according to "long-term excessive intake of Manganese increases the risk of Parkinson's Disease ", interpretation of these stainless steel tableware "harmful to health ".

The State has requirements on the materials used for stainless steel tableware, including the limitation on the manganese content. However, this restriction is not based on "if it exceeds the standard, it will endanger food safety. It is only a specification for steel. The "content in steel" is totally different from the "amount that may be absorbed into food. According to the current news reports, supor did not deny that "materials do not comply with national standards", but stressed that its tableware indicators are qualified. They also cited foreign situations and believed that the current national standards were unreasonable and should allow more materials.

There is no conflict between the two. The current National Standard specifies some stainless steel models and indicators, which means that if these steel products are used, they will be "qualified. On the other hand, as supor said, the industry is always developing. Many new types of steel, or even more suitable, are emerging, but are not included in national standards. Using the new steel to make tableware may also fully comply with various food safety standards.

Therefore, supor's "manganese exceeding the standard" tableware violates the national standard of material. However, this standard is not based on food safety. We cannot use it to describe "if it exceeds the standard, it will be harmful to health", or "if it exceeds the standard, it will not endanger health ".

From the perspective of regulations, supor does not comply with the national standard. They believe that the current national standard is unreasonable and does not comply with international practices. Technically, this is not surprising. In the future, if the national standard is revised to allow the use of the steel they currently use, it is not necessarily a "black screen ". However, before the national standard is revised, their practices do not comply with standards-or, at least, do not comply with all national standards. What kind of punishment should be imposed on such violations should be determined by the competent authority. However, it is not reasonable for the media to crack down on food safety incidents through speculation.

Harmful tableware with "manganese exceeding the standard"
Because manganese is an essential nutrient in the body, excessive intake is harmful, so it is meaningless to leave the amount to talk about whether it is harmful.

If the amount of food precipitated from tableware is insignificant, you don't have to worry about it. If the precipitation in the tableware cannot be ignored, there are three situations:

1. If a person suffers from insufficient manganese from other sources, such tableware may even play the role of "Adding manganese;

2. If a person consumes enough manganese from other sources, but there is still a relatively large distance from the excess, and the manganese precipitated from these tableware is still significantly lower than the "safe limit ", then these manganese do not matter;

3. If a person's manganese intake is close to or exceeds the safety limit, the manganese precipitated in the tableware will become worse.

Therefore, the manganese content of tableware with "manganese exceeding the standard" is not the only factor that determines whether it is safe. The key factor is the amount of precipitation and the amount of intake from other approaches. Without these two indicators, everything is on paper.

According to news, the Chinese population's manganese intake is roughly 6.8 mg per day. Supor's test data is that the amount of steel precipitated is 0.05 mg per kilogram. If this data is true, the amount of manganese precipitated from these tableware is insignificant and will hardly change the total manganese intake. Or, in the second case above, the amount of manganese precipitated is insufficient to make the average manganese intake reach the "safe limit ".

Due to the nutritional and toxic characteristics of manganese, the international standard for manganese precipitation in tableware is generally not set. The sensitivity of food safety issues prompted the national food safety risk assessment center to evaluate the manganese precipitation in stainless steel tableware. Regardless of the outcome, this is always an improvement. No matter whether the previous national standard is reasonable or not, or whether or not supor's detection data is, let's wait and see our evaluation of the food safety risk assessment center.

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