Vitamin of B12 (цианокобаламин) 2936260000
Vitamins B12 is a group of cobalt-containing biologically active substances called cobalamins.
These include cyanocobalamin itself is a product obtained during the chemical purification of vitamin with cyanides, hydroxycobalamin and two coenzyme forms of vitamin B12: methylcobalamin and 5-deoxyadenosylcobalamin.
Neither animals nor plants are able to synthesize the vitamin AT 12. It is the only vitamin synthesized almost exclusively by microorganisms: bacteria, actinomycetes and blue-green algae. Of the animal tissues, the liver and kidneys are the richest in vitamin B12. Although this vitamin is produced by microorganisms in the digestive tract of any animal, including humans, as a product of microflora activity, however, it cannot be absorbed, since it is formed in the large intestine and cannot enter the small intestine. Therefore, a person receives vitamin B12 mainly from animal food, including meat, fish, eggs and dairy products.
Foods fortified with them can also be a source of cobalamins: for example, for vegetarians and vegans, such a source is breakfast cereals, brewer's yeast and nutritional yeast artificially fortified with vitamin B12; fortified flakes and crushed grain products, as well as special additives. In the food industry in many countries, the vitamin is added to foods such as breakfast cereals, exceeding the concentration of which leads to damage to the nervous system and an increased risk of cardiovascular diseases.
Consumption rate .
The minimum daily requirement is 3 mcg. Even if we eat very little meat, milk and eggs, we give the body about 15 mcg of cyanocobalamin.
|Minimum daily norm||3 mcg.|