A healthy result should fall into the range 300 - 647 pg/mL, or 221.40 - 477.49 pmol/L.

Vitamin B12 and folate are separate tests often used in conjunction to detect deficiencies and to help diagnose the cause of certain anemias, such as pernicious anemia, an autoimmune disease that affects the absorption of B12. B12 and folate are two vitamins that cannot be produced by the body and must be supplied by the diet. They are required for normal red blood cell formation, repair of tissues and cells, and synthesis of DNA. B12 is also essential for proper nerve function. B12 and folate levels may be ordered when a complete blood count is done as a part of a routine health checkup. Testing for B12 and folate levels may be appropriate when a person has signs and symptoms of deficiency, such as:

            -Diarrhea

            -Dizziness

            -Fatigue

            -Loss of appetite

            -Pale skin

            -Rapid heart beat

            -Shortness of breath

            -Sore tongue and mouth

            -Tingling or numbness in the extremities

            -Confusion

            -Paranoia

Vitamin B12 result calculator

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