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Cyanocobalamin is a form of vitamin B 12 used to treat and prevent vitamin B 12 deficiency except in the presence of cyanide toxicity. [7] [8] [2] The deficiency may occur in pernicious anemia, following surgical removal of the stomach, with fish tapeworm, or due to bowel cancer.
"B12" and "Cbl" redirect here. For other uses of B12, see B12 (disambiguation). For the musical group, see Carbon Based Lifeforms. Pharmaceutical compound Vitamin B12 General skeletal formula of cobalamins Stick model of cyanocobalamin (R = CN) based on the crystal structure Clinical data Other names Vitamin B12, vitamin B-12, cobalamin AHFS / Drugs.com Monograph MedlinePlus a605007 License ...
The data from the National Health and Nutrition Examination Survey (NHANES) reported the prevalence of serum vitamin B 12 concentrations in the United States population between 1999 and 2002. [157] [158] Serum vitamin B 12 concentrations of < 148 pmol/L was present in < 1% of children and adolescents. In adults aged 20–39 years ...
Cyanocobalamin is usually converted to hydroxocobalamin in the serum, whereas hydroxocobalamin is converted to either methylcobalamin or adenosylcobalamin. Cobalamins circulate bound to serum proteins called transcobalamins (TC) and haptocorrins. Hydroxocobalamin has a higher affinity to the TC II transport protein than cyanocobalamin, or ...
Normal serum levels may be found in cases of deficiency where myeloproliferative disorders, liver disease, transcobalamin II, or small intestinal bacterial overgrowth are present. [ 56 ] [ 57 ] Low levels of serum vitamin B 12 may be caused by other factors than B 12 deficiency, such as folate deficiency , pregnancy , oral contraceptive use ...
The Schilling test has multiple stages. [3] As noted below, it can be done at any time after vitamin B 12 supplementation and body store replacement, and some clinicians recommend that in severe deficiency cases, at least several weeks of vitamin repletion be done before the test (more than one B 12 shot, and also oral folic acid), in order to ensure that impaired absorption of B 12 (with or ...
In molecular biology, the vitamin B12-binding domain is a protein domain which binds to cobalamin (vitamin B12). It can bind two different forms of the cobalamin cofactor, with cobalt bonded either to a methyl group (methylcobalamin) or to 5'-deoxyadenosine (adenosylcobalamin).
Normal serum concentrations of α-tocopherol in adults ranges from 5 to 20 μg/mL. [2] ... Cyanocobalamin, hydroxocobalamin, methylcobalamin, adenosylcobalamin: