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Vitamin B6 Test

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About Our Vitamin B6 Test

This blood test is used to evaluate Vitamin B6 levels. Vitamin B6 is involved in the process of making serotonin and norepinephrine, chemicals that transmit signals in the brain. It is also involved in the formation of myelin, a fatty protein layer that forms around nerve cells.

Mild vitamin B6 deficiencies are common, but more serious deficiencies can cause health problems in adults that affect the skin, mucous membranes, nerves and circulatory system. In children, the central nervous system (CNS) can be affected.

Deficient B6 levels can lead to:

  • Sideroblastic anemia
  • Lethargy/Chronic fatigue
  • Dry, scaling skin conditions
  • Pink eye/conjunctivitis
  • Neuropathy and/or confusion

Major sources of vitamin B6 include:

  • Cereal grains and flour
  • Vegetables like peas, spinach and carrots
  • Seeds and nuts
  • Legumes
  • Potatoes
  • Milk and cheeses
  • Fish, meat and eggs
  • Liver

Vitamin B6 deficiency can be more prevalent in people who:

  • Have kidney or heart failure
  • Are alcoholics
  • Have cirrhosis
  • Have hyperthyroidism
  • Are taking anticonvulsants or corticosteroids
  • Are living with digestive disorders
Medically Reviewed by: 2019-03-07

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