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Vitamin B-12

Vitamin B-12

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Why Get Tested?
To help diagnose one cause of anemia or neuropathy; to evaluate nutritional status in some people; to monitor the effectiveness of treatment for vitamin B12 or folate deficiency

When to Get Tested?
When you have an abnormal CBC with a blood smear showing large red blood cells (macrocytosis) or abnormal (hypersegmented) neutrophils; when you have symptoms of anemia (weakness, tiredness, pale skin) and/or of neuropathy (tingling or itching sensations, eye twitching, memory loss, altered mental status); when you are being treated for vitamin B12 or folate deficiency

Sample Required?
A blood sample drawn from a vein in your arm

Test Preparation Needed?
Fasting for 6-8 hours before sample collection may be required.