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Some time ago， Jiangsu Province Quality and Technical Supervision issued the "2016 Kettle risk monitoring product quality analysis report"， the report involving a total of seven risk monitoring program， which found that the main problem is that among 55.6% of the kettles in the market， the manganese content is about 10% and the highest amount reaches up to 1.168mg / L； while in the "drinking water health standards" （GB 5749-2006）， the maximum amount of precipitation of manganese is only 0.1mg / L. "Report" also pointed out that "Manganese is an essential trace element to meet the basic human needs through the daily dietary intake， but if the body is of long-term excessive intake of it， it will cause memory loss， lethargy， malaise， nerve dysfunction and other symptoms. "It is this report that has once again pushed stainless steel electric kettle and other utensils to the cusp place.
What does manganese mean to human body？
Manganese is one of the essential trace elements， which can promote bone growth and development， maintaining normal sugar and fat metabolism. Intake of trace amounts of manganese can not only protect cells from mitochondrial integrity， but also maintain normal brain function， and improvement to hematopoietic function as well. Among common foods in daily life， cereals， nuts， leafy vegetables etc. are rich in manganese； and concerning general animal foods， though not high in manganese content， the absorption rate is relatively high， which can be considered a good source of manganese.
The right amount of manganese is needed by the body， but long-term intake of too much or too little will cause harm. We have already mentioned the dangers of excess manganese； then what impact will the manganese deficiency have to human body？
Deficiency of manganese can mainly affect human reproductive capacity and mental development. In addition， it can also cause unnormal bone and cartilage formation， easily leading to impaired glucose tolerance， reduced insulin synthesis and secretion of other consequences， hence affecting glucose metabolism.
Dosage amount determines toxicity
Since both excessive and deficient intake will affect human health， then what amount on earth human body need to take manganese？ Recommended by "Chinese Dietary Reference Intakes Quick Reference Guide" （2013 edition）， daily adequate intake of the adolescents is 4.5mg， and the maximum tolerable daily amount is 10mg whereas the highest adult tolerable amount is 11mg， long-term intake higher than the maximum tolerated dose of manganese will cause nervous system damage mentioned above. According to suggestions of the "Chinese Dietary Reference Intakes Quick Reference Guide" （2013 edition）， daily water intake of teenagers of 14 to 17 years old is 1.4L while that of adults over the age is 1.7L， on the recommendation of drinking water and precipitation of manganese up to 1.168mg / L in electric kettle based on the report， given the daily drink depends completely on the electric kettle，daily intake of manganese among adolescents of these two ages are respectively 1.64mg and 1.99mg， both not meeting the appropriate daily intake. Thus， with normal daily diet， people’s daily intake of manganese is generally not out of bounds.
Consequently， “dosage amount determines toxicity”. Without considering the daily water intake as well as the maximum tolerated dose of these factors， individual manganese content of the kettle or precipitation amount of data will only lead the public into a panic for no reason.
How to choose stainless steel utensils
Then in the selection of stainless steel utensils， what should people pay attention to？ How can people choose right products to meet national standards？ The author summarizes the "Three Checks"...
1. Check the Sign
When buying stainless steel electric kettle and other tableware products， we should focus on the business name， address， voltage parameters， power parameters and other basic information， trying to choose well-known manufacturers. At the same time， according to state regulations， since November 21， 2011， the manufacturer must mark with the type of stainless steel and the words "food contact" on the product. Thus when buying stainless steel electric kettle and other tableware products， we should pay attention to check；
2. Check the Material
According to national regulations， since November 21， 2011， the manufacturers must be mark stainless steel and steel type （category） on the product， such as 304 or 430 stainless steel and other grades. If still worried about manganese content and the amount of precipitation problems， people can choose stainless steel grade 304， because according to the data of the report， its manganese content is below 2% whereas the amount of precipitation is less than 0.1mg / L；
3. Check the “CCC”
Electric food preparation appliances belong to national compulsory product， namely the need to obtain "CCC certification." When buying an electric kettle and other related utensils， to recognize whether or not to have this certification or inform ourselves about the authenticity of the authentication， we can turn to Certification and Accreditation Regulatory Commission official website （www.cnca.gov.cn） for verification；
Apart from the “Three Checks” mentioned above， when buying stainless stainless products， we also need to pay attention to the "three guarantees" service undertaking， requesting business initiative an invoice to ensure proper service after purchasing.
As one of the common household stainless steel products， electric kettle has always been controversy with continuous rumor. In fact， as long as they meet the national standard， we can rest assured using them.
What does manganese mean to human body？
Manganese is one of the essential trace elements， which can promote bone growth and development， maintaining normal sugar and fat metabolism. Intake of trace amounts of manganese can not only protect cells from mitochondrial integrity， but also maintain normal brain function， and improvement to hematopoietic function as well. Among common foods in daily life， cereals， nuts， leafy vegetables etc. are rich in manganese； and concerning general animal foods， though not high in manganese content， the absorption rate is relatively high， which can be considered a good source of manganese.
The right amount of manganese is needed by the body， but long-term intake of too much or too little will cause harm. We have already mentioned the dangers of excess manganese； then what impact will the manganese deficiency have to human body？
Deficiency of manganese can mainly affect human reproductive capacity and mental development. In addition， it can also cause unnormal bone and cartilage formation， easily leading to impaired glucose tolerance， reduced insulin synthesis and secretion of other consequences， hence affecting glucose metabolism.
Dosage amount determines toxicity
Since both excessive and deficient intake will affect human health， then what amount on earth human body need to take manganese？ Recommended by "Chinese Dietary Reference Intakes Quick Reference Guide" （2013 edition）， daily adequate intake of the adolescents is 4.5mg， and the maximum tolerable daily amount is 10mg whereas the highest adult tolerable amount is 11mg， long-term intake higher than the maximum tolerated dose of manganese will cause nervous system damage mentioned above. According to suggestions of the "Chinese Dietary Reference Intakes Quick Reference Guide" （2013 edition）， daily water intake of teenagers of 14 to 17 years old is 1.4L while that of adults over the age is 1.7L， on the recommendation of drinking water and precipitation of manganese up to 1.168mg / L in electric kettle based on the report， given the daily drink depends completely on the electric kettle，daily intake of manganese among adolescents of these two ages are respectively 1.64mg and 1.99mg， both not meeting the appropriate daily intake. Thus， with normal daily diet， people’s daily intake of manganese is generally not out of bounds.
Consequently， “dosage amount determines toxicity”. Without considering the daily water intake as well as the maximum tolerated dose of these factors， individual manganese content of the kettle or precipitation amount of data will only lead the public into a panic for no reason.
How to choose stainless steel utensils
Then in the selection of stainless steel utensils， what should people pay attention to？ How can people choose right products to meet national standards？ The author summarizes the "Three Checks"...
1. Check the Sign
When buying stainless steel electric kettle and other tableware products， we should focus on the business name， address， voltage parameters， power parameters and other basic information， trying to choose well-known manufacturers. At the same time， according to state regulations， since November 21， 2011， the manufacturer must mark with the type of stainless steel and the words "food contact" on the product. Thus when buying stainless steel electric kettle and other tableware products， we should pay attention to check；
2. Check the Material
According to national regulations， since November 21， 2011， the manufacturers must be mark stainless steel and steel type （category） on the product， such as 304 or 430 stainless steel and other grades. If still worried about manganese content and the amount of precipitation problems， people can choose stainless steel grade 304， because according to the data of the report， its manganese content is below 2% whereas the amount of precipitation is less than 0.1mg / L；
3. Check the “CCC”
Electric food preparation appliances belong to national compulsory product， namely the need to obtain "CCC certification." When buying an electric kettle and other related utensils， to recognize whether or not to have this certification or inform ourselves about the authenticity of the authentication， we can turn to Certification and Accreditation Regulatory Commission official website （www.cnca.gov.cn） for verification；
Apart from the “Three Checks” mentioned above， when buying stainless stainless products， we also need to pay attention to the "three guarantees" service undertaking， requesting business initiative an invoice to ensure proper service after purchasing.
As one of the common household stainless steel products， electric kettle has always been controversy with continuous rumor. In fact， as long as they meet the national standard， we can rest assured using them.