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Vitamin B 12 deficiency, also known as cobalamin deficiency, is the medical condition in which the blood and tissue have a lower than normal level of vitamin B 12. [5] Symptoms can vary from none to severe. [1] Mild deficiency may have few or absent symptoms. [1]
[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, haptocorrin deficiency, and myeloma. [57] High serum levels may caused by supplementing with vitamin B 12 , present of antibodies to intrinsic factor, or due to underlying condition.
"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 ...
Vitamin B 12 deficiency: Anemia, neurological and digestive disorders. [36] [37] This may result in feeling tired, shortness of breath, lightheadedness, headaches, mouth ulcers, pale skin, rapid heartbeat, loss of appetite, hair loss, low blood pressure, decreased ability to think, joint pain, numbness and tingling to the fingers and toes, and ...
12 is the "generic descriptor" name for any vitamers of vitamin B 12. Animals, including humans, can convert cyanocobalamin to any one of the active vitamin B 12 compounds. [21] Cyanocobalamin is one of the most widely manufactured vitamers in the vitamin B 12 family (the family of chemicals that function as B 12 when put into the body ...
Vitamin B 5: None: No toxicity known. Vitamin B 6: US UL = 100 mg/day; EU UL = 25 mg/day: See Megavitamin-B 6 syndrome for more information. Vitamin B 7: None: No toxicity known. Folate 1 mg/day [26] Masks B 12 deficiency, which can lead to permanent neurological damage. [26] Vitamin B 12: None established [27] Skin and spinal lesions.
Hydroxocobalamin, also known as vitamin B 12a and hydroxycobalamin, is a vitamin found in food and used as a dietary supplement. [1] As a supplement it is used to treat vitamin B12 deficiency including pernicious anemia.
Hypervitaminosis is a condition of abnormally high storage levels of vitamins, which can lead to various symptoms as over excitement, irritability, or even toxicity. Specific medical names of the different conditions are derived from the given vitamin involved: an excess of vitamin A , for example, is called hypervitaminosis A .