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  2. Vitamin B12 - Wikipedia

    en.wikipedia.org/wiki/Vitamin_B12

    Vitamin B 12 was discovered as a result of pernicious anemia, an autoimmune disorder in which the blood has a lower than normal number of red blood cells, due to a deficiency of vitamin B 12. [5] [16] The ability to absorb the vitamin declines with age, especially in people over 60. [17]

  3. Vitamin B12 deficiency - Wikipedia

    en.wikipedia.org/wiki/Vitamin_B12_deficiency

    Vitamin B 12 deficiency can be determined, but not always. [14] This means it measures forms of vitamin B 12 that are "active" and can be used by the body, as well as the "inactive" forms, which cannot. [151] Vitamin B 12 deficiency can be found within normal levels, so clinical symptoms should be taken into account when a diagnosis is made. [2]

  4. Vitamin B12 total synthesis - Wikipedia

    en.wikipedia.org/wiki/Vitamin_B12_total_synthesis

    The structure of vitamin B 12 was the first low-molecular weight natural product determined by x-ray analysis rather than by chemical degradation. Thus, while the structure of this novel type of complex biomolecule was established, its chemistry remained essentially unknown; exploration of this chemistry became one of the tasks of the vitamin's chemical synthesis.

  5. 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]

  6. Vitamin B12 Is a Power Nutrient. Here's How to Know If ... - AOL

    www.aol.com/vitamin-b12-power-nutrient-heres...

    Vitamin B12 requirements are low because we can store up to 2,500 micrograms in the liver,” says Ryan D. Andrews, R.D., C.S.C.S., principal nutritionist at Precision Nutrition. So target just ...

  7. How vitamin B12 could give you an energy boost - AOL

    www.aol.com/finance/vitamin-b12-could-energy...

    Vitamin B12 can be found in multivitamins, B-complex supplements, and by itself in a B12 supplement, which are available in many natural and synthetic forms including cyanocobalamin and ...

  8. Dorothy Hodgkin - Wikipedia

    en.wikipedia.org/wiki/Dorothy_Hodgkin

    In 1948, Hodgkin first encountered vitamin B 12, [38] one of the most structurally complex vitamins known, and created new crystals. Vitamin B 12 had first been discovered at Merck earlier that year. It had a structure at the time that was almost completely unknown, and when Hodgkin discovered it contained cobalt, she realized the structure ...

  9. Vitamin - Wikipedia

    en.wikipedia.org/wiki/Vitamin

    Both deficient and excess intake of a vitamin can potentially cause clinically significant illness, although excess intake of water-soluble vitamins is less likely to do so. All the vitamins were discovered between 1913 and 1948. Historically, when intake of vitamins from diet was lacking, the results were vitamin deficiency diseases.

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