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Vitamin B 12 deficiency; Other names: Hypocobalaminemia, cobalamin deficiency: Image of the cervical spinal cord in vitamin B 12 deficiency showing subacute combined degeneration. . (A) The midsagittal T2 weighted image shows linear hyperintensity in the posterior portion of the cervical tract of the spinal cord (black arrow
Serum vitamin B 12 is a medical laboratory test that measure vitamin B 12 only in the blood binding to both transcobalamins. [1] Most of the time, 80–94% of vitamin B 12 in the blood binds to haptocorrin , while only 6–20% is binds to transcobalamin ll. [ 2 ] Only transcobalamin ll is "active" and can be used by the body. [ 1 ]
How fast B 12 levels change depends on the balance between how much B 12 is obtained from the diet, how much is secreted and how much is absorbed. The total amount of vitamin B 12 stored in the body is about 2–5 mg in adults. Around 50% of this is stored in the liver.
A vitamin B12 level of less than 200 pg/mL is considered deficient. Treatment First, have your health care provider run blood tests to see if you truly have a B12 deficiency.
Pernicious anemia, or Addison's anemia, is an autoimmune disease which decreases red blood cell count, caused by the body's inability to properly absorb vitamin B12. It can cause diarrhea, pale ...
B12 supplements in the form of oral or sublingual tablets that dissolve under the tongue are an over-the-counter treatment option for people who lack B12 in their diets, like vegans or vegetarians ...
More specifically, optimal levels are generally close to a central tendency of the values found in the population. However, usual and optimal levels may differ substantially, most notably among vitamins and blood lipids, so these tables give limits on both standard and optimal (or target) ranges.
Registered dietitians explain what vitamin B12 is, how much you need, and the potential side effects of taking too much. Skip to main content. 24/7 Help. For premium support please call: ...
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