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Vitamin B 12, also known as cobalamin, is a water-soluble vitamin involved in metabolism. [2] It is one of eight B vitamins.It is required by animals, which use it as a cofactor in DNA synthesis, and in both fatty acid and amino acid metabolism. [3]
Vitamin B 12 cannot be produced by the human body, and must be obtained from the diet. [2] The body normally gets enough vitamin B 12 from the consumption of foods from animal sources. [2] Inadequate dietary intake of animal products such as eggs, meat, milk, fish, fowl (and some type of edible algae) can result in a deficiency state. [134]
Serum vitamin B 12 is a medical laboratory test that measure vitamin B 12 only in the blood binding to both transcobalamins. [1] Most of the time, 80–94% of vitamin B 12 in the blood binds to haptocorrin, while only 6–20% is binds to transcobalamin ll. [2] Only transcobalamin ll is "active" and can be used by the body. [1]
In pigs it is obtained from the pylorus and beginning of the duodenum; [12] in human beings it is present in the fundus and body of the stomach. [ 13 ] The limited amount of normal human gastric intrinsic factor limits normal efficient absorption of B 12 to about 2 μg per meal, a nominally adequate intake of B 12 .
“The combination of body and cognitive changes is a major clue that a treatable cause such as B12 deficiency could be the issue,” he says. How vitamin B12 deficiency is detected
Hydroxocobalamin, or another form of vitamin B 12, are required for the body to make DNA. [7] Hydroxocobalamin was first isolated in 1949. [9] It is on the World Health Organization's List of Essential Medicines. [10] Hydroxocobalamin is available as a generic medication. [2] Commercially it is made using one of a number of types of bacteria. [11]
NYC's Times Square is already preparing for the New Year's Eve festivities. (Michael M. Santiago/Getty Images) (Michael M. Santiago via Getty Images)
President-elect Donald Trump's transition team will arrive at the Pentagon on Monday, a Pentagon spokesperson said, after a delay in signing an agreement after the Nov. 5 election to formally ...