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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]
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). Measurement of blood methylmalonic acid (MMA), a vitamin B 12-associated metabolite, is a commonly used biomarker. [2] Deficiency is often suspected first, as diagnosis usually requires several tests.
Vitamin B 12, also known as cobalamin, is a water-soluble vitamin involved in metabolism. [2] It is one of eight B vitamins.It is required by animals, which use it as a cofactor in DNA synthesis, and in both fatty acid and amino acid metabolism. [3]
First, have your health care provider run blood tests to see if you truly have a B12 deficiency. If you do, the only way to treat it is to consume more B12, either through food, supplements or ...
An expert reveals why you shouldn't ignore symptoms of a B12 deficiency and what you can do to treat it.
When suspected, diagnosis is made by blood tests initially a complete blood count, and occasionally, bone marrow tests. [6] Blood tests may show fewer but larger red blood cells, low numbers of young red blood cells, low levels of vitamin B 12, and antibodies to intrinsic factor. [6] Diagnosis is not always straightforward and can be ...