Monosodium glutamate is a kind of seasoning that people are very familiar with. Many families are using it. But the rumor that monosodium glutamate is carcinogenic has always been a mystery. Is monosodium glutamate really carcinogenic? What is the essence of monosodium glutamate? Let's have a look.
Is it true that MSG causes cancer
Monosodium glutamate does produce harmful substances when heated at 100 ℃.
1. The main component of monosodium glutamate is sodium glutamate, the sodium salt of glutamic acid. The molecular formula is: sodium glutamate is hydrolyzed to glutamic acid, and glutamic acid has fresh taste, which is the reason why monosodium glutamate can be fresh. In the process of protein hydrolysis, sodium glutamate was isolated for the first time. In 1908, Japanese chemist kikuomiao Ikeda extracted sodium glutamate from kelp. In the second year, Suzuki sanlangsu commercialized it, named "weizhisu", and began to sell it, which is the most primitive monosodium glutamate.
2. Sodium glutamate is found in grapes, tomatoes and other fruits. Since grapes and tomatoes are harmless, monosodium glutamate can also be eaten. As for the hydrolyzed glutamate, it is also a nutrient needed by the human body. Many animal and plant protein foods in life contain glutamate, such as milk, eggs, pork and so on. The theory of "monosodium glutamate is poisonous" will not break through.
3. Monosodium glutamate is a kind of seasoning. Its main component is sodium glutamate. It should be noted that if monosodium glutamate is used in high temperature above 100 ℃, the taste agent sodium glutamate will be transformed into sodium pyroglutamate which is carcinogenic to human body. And if it's in an alkaline environment, MSG will react chemically to produce a substance called disodium glutamate. So use and store properly.
What is monosodium glutamate extracted from
It is usually extracted from substances such as starch and sugar.
1. Sodium glutamate (c5h8no4na), also known as sodium glutamate. Glutamate is a kind of amino acid and the final product of protein decomposition. Sodium glutamate is a sodium salt of amino acids. It is a colorless and tasteless crystal that disintegrates and melts at 232-deg; C. The water solubility of sodium glutamate is very good, and the solubility at 20 ℃ is 74 g (that is, at 20 ℃, at most 74 g of sodium glutamate can be dissolved in 100 ml of water).
2. Monosodium glutamate is a kind of seasoning. Its main component is sodium glutamate. The main function of monosodium glutamate is to increase the freshness of food. It is used most in Chinese dishes and can also be used in soup and sauce.
3. Fresh taste is widely found in food, mainly from amino acids, organic acids, glutamic acid and other elements in food. In particular, protein rich foods contain more, such as fish soup and seafood. As like as two peas, glutamate is the same ingredient in glutamate.
Monosodium glutamate refers to the crystal of sodium glutamate which is fermented and purified from grains. Since 1965, glutamic acid has been produced from sugar or starch in China. Then, glutamic acid is extracted by isoelectric point crystallization precipitation, ion exchange or zinc salt refining, and then sodium glutamate crystal is made by decolorization, de iron, evaporation, crystallization and other processes.
No matter what kind of monosodium glutamate, it contains monosodium glutamate. So chicken essence is also a kind of monosodium glutamate, just adding other chemical ingredients.
Monosodium glutamate and chicken essence are condiments, both of which can be eaten at ease. But the principle to master is not to overeat, not to heat for a long time, because we can not ignore health while enjoying delicious food.