Overview of Vitamin B12
Why Get Tested
- If you have symptoms of anemia like weakness, tiredness, pale skin
- If you have an abnormal complete blood count and your blood smear shows large red blood cells or neutrophils with more than 5 lobes
- If you have symptoms or signs of nerve problems like numbness, burning in hands, feet, arms or tingling sensation
- If you are being treated with vitamin B12 or folate therapy
- Do not eat or drink anything other than water for 8-12 hours before the test.
What Results of Vitamin B12 mean?
Low levels indicate Vitamin B12 deficiency.
Causes of vitamin B12 deficiency include:
b.Improper absorption from intestine (malabsorption)
c.Lack of intrinsic factor (Pernicious anemia)
Very rarely, levels of vitamin B12 can be increased. Various causes may be:
b.Myeloproliferative disorders like chronic myeloid leukemia