a nutrient in the vitamin b complex that the body needs in small amounts to function and stay healthy. vitamin b12 helps make red blood cells, dna, rna, energy, and tissues, and keeps nerve cells healthy. it is found in liver, meat, eggs, poultry, shellfish, milk, and milk products. vitamin b12 is water-soluble (can dissolve in water) and must be taken in every day. not enough vitamin b12 can cause certain types of anemia (a condition in which the number of red blood cells is below normal) and neurologic disorders. it is being studied with folate in the prevention and treatment of some types of cancer. also called cobalamin and cyanocobalamin.
身体の機能や健康維持のために少量だけ必要とされるビタミンb群の栄養素。ビタミンb12は赤血球、dna、rna、エネルギー、組織などの生成に関与し、神経細胞を健全な状態に維持に関与する働きをする。レバー、肉類、卵、鳥肉、貝類や甲殻類、牛乳、乳製品などに含まれる。ビタミンb12は水溶性(水に溶けること)であり、毎日摂取する必要がある。ビタミンb12が不足すると、特定の種類の貧血(赤血球の数が正常値を下回った状態)や神経障害が生じる場合がある。一部のがんに対する予防および治療の分野において葉酸とともに研究されている。「cobalamin(コバラミン)」、「cyanocobalamin(シアノコバラミン)」とも呼ばれる。
出典:Wikipedia
出典:『Wikipedia』 (2011/07/30 18:36 UTC 版)
Vitamin B12, vitamin B12 or vitamin B-12, also called cobalamin, is a water soluble vitamin with a key role in the normal functioning of the brain and nervous system, and for the formation of blood. It is one of the eight B vitamins. It is normally involved in the metabolism of every cell of the human body, especially affecting DNA synthesis and regulation, but also fatty acid synthesis and energy production. As the largest and most structurally complicated vitamin, it can be produced industrially only through bacterial fermentation-synthesis.