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  2. Vitamin B12 deficiency - Wikipedia

    en.wikipedia.org/wiki/Vitamin_B12_deficiency

    Vitamin B 12 deficiency is preventable with supplements, which are recommended for pregnant vegetarians and vegans, and not harmful in others. [2] Risk of toxicity due to vitamin B 12 is low. [2] Vitamin B 12 deficiency in the US and the UK is estimated to occur in about 6 percent of those under the age of 60, and 20 percent of those over the ...

  3. Vitamin B12 - Wikipedia

    en.wikipedia.org/wiki/Vitamin_B12

    Folate levels in the individual may affect the course of pathological changes and symptomatology of vitamin B 12 deficiency. Vitamin B 12 deficiency in pregnant women is strongly associated with an increased risk of spontaneous abortion, congenital malformations such as neural tube defects, and problems with brain development growth in the ...

  4. Serum vitamin B12 - Wikipedia

    en.wikipedia.org/wiki/Serum_vitamin_B12

    A diagnosis of vitamin B 12 deficiency is determined by blood levels lower than 200 or 250 picograms per ml (148 or 185 picomoles per liter). [3] Some people can have symptoms with their normal levels of the vitamin, or may have low levels despite having no symptoms. [5] Other tests may be done to ensure individuals status. [3]

  5. Hypervitaminosis - Wikipedia

    en.wikipedia.org/wiki/Hypervitaminosis

    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 .

  6. Pernicious anemia - Wikipedia

    en.wikipedia.org/wiki/Pernicious_anemia

    [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. [56]

  7. Hyperhomocysteinemia - Wikipedia

    en.wikipedia.org/wiki/Hyperhomocysteinemia

    Hyperhomocysteinemia is typically managed with vitamin B 6, vitamin B 9 and vitamin B 12 supplementation. [4] Hyperhomocysteinemia is a risk factor for cardiovascular disease; supplements of these vitamins may slightly reduce stroke outcome but not myocardial infarction, death from any cause or adverse events. [5]

  8. Hydroxocobalamin - Wikipedia

    en.wikipedia.org/wiki/Hydroxocobalamin

    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. [1] [2] Other uses include treatment for cyanide poisoning, Leber's optic atrophy, and toxic amblyopia.

  9. Vitamin deficiency - Wikipedia

    en.wikipedia.org/wiki/Vitamin_deficiency

    Supplementation with folate can mask vitamin B 12 deficiency. [39] [40] Consuming a vegan diet increases the risk, since Vitamin B 12 is mostly found in food and drinks made from animal products, including eggs and dairy products. Vitamin C deficiency: Deficiency leads to weakness, weight loss and general aches and pains.

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