Vitamin B12 is needed to produce an adequate amount of healthy red blood cells in the bone marrow. Vitamin B12 is available only in animal foods (meat and dairy products) or yeast extracts (such as brewer's yeast). Vitamin B12 deficiency is defined by low levels of stored B12 in the body that can result in anemia, a lower-than-normal number of red blood cells.
Vitamin B12 deficiency can develop for the following reasons:
Absence of intrinsic factor, also called pernicious ...
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Source: ADAM Encyclopedia
Normal ValuesNormal values are 200 - 900 pg/mL (picograms per milliliter).Normal value ranges may vary slightly among different laboratories. Talk to... Read more »
Source: ADAM Encyclopedia
Anemia is a condition in which the body does not have enough healthy red blood cells. Red blood cells provide oxygen to body tissues.Vitamin B12... Read more »
Source: HealthCentral Encyclopedia
This is impaired absorption of nutrients from the GI tract.Many different conditions and circumstances can affect the ability of the small intestine... Read more »