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B Vitamins

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Also known as: Vitamin B complex
Formal name: B1 (thiamine or thiamin); B2 (riboflavin); B3 (niacin); B5 (pantothenic acid); B6 (pyridoxal phosphate); B7 (biotin)
Related tests: Vitamin B12 and Folate

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Looking specifically for detail on Vitamin B12 testing?

At a Glance

Why Get Tested?

To screen for and detect moderate to severe vitamin B deficiencies

When to Get Tested?

When you have symptoms that may be due to a B vitamin deficiency, are at risk for a deficiency, or have a condition associated with malabsorption

Sample Required?

A blood sample drawn from a vein in your arm; a random or 24-hour urine sample may also be collected.

Test Preparation Needed?

Fasting is usually required for blood testing.