Synonyms: Vitamin B complex

Why It Is Done

To screen for and detect moderate to severe vitamin B deficiencies

Testing may also be used for those who have a condition that puts them at risk of B vitamin deficiencies. This may include those with a limited or inadequate diet, those with signs of malnutrition, those being given their nutrition intravenously (parenteral nutrition), and those who have had gastric bypass surgery. Testing may also be performed on those with alcoholism or with chronic diseases associated with malabsorption, such as Celiac disease.

How to Prepare:

Fasting is usually required for blood testing.