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Vitamin B12 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 ]
Vitamin B 12 is the most chemically complex of all vitamins, [6] and for humans the only vitamin that must be sourced from animal-derived foods or supplements. [2] [7] Only some archaea and bacteria can synthesize vitamin B 12. [8] Vitamin B 12 deficiency is a widespread condition that is particularly prevalent in populations with low ...
Most Americans get plenty of vitamin B12 through the food they eat, but there are some notable exceptions (older Americans are particularly at risk, because they have less intrinsic factor, with ...
Couple that with the fact that older adults are more likely to have trouble fully absorbing vitamin B12, putting them at risk for a deficiency, and doctors say that vitamin B12 deficiency should ...
The Schilling test distinguished PA from other forms of B 12 deficiency, [50] specifically, from Imerslund–Gräsbeck syndrome, a B 12-deficiency caused by mutations in CUBN that codes for cubilin the cobalamin receptor. [1] Vitamin B12 deficiency is also prevalent in patients having Crohn's disease (CD) so it should be differentiated. [62]
Groups most at risk of B12 deficiency. ... A vitamin B12 deficiency can be caused by a gastrointestinal disorder or a lack of B12 in your diet. Signs of a B12 deficiency include weakness, fatigue ...
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