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Vitamin B6

Pyridoxal; Pyridoxine; Pyridoxamine

Vitamin B6 is a water-soluble vitamin. Water-soluble vitamins dissolve in water so the body cannot store them. Leftover amounts of the vitamin leave the body through the urine. Although the body maintains a small pool of water soluble vitamins, they have to be taken regularly.

Lack of Vitamin B6 in the body is uncommon. It can occur in people with kidney failure, liver disease, or drinking problem.

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Vitamin B6 benefit
Vitamin B6 source

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Function

Vitamin B6 helps the body to:

Food Sources

Vitamin B6 is found in:

Fortified breads and cereals may also contain vitamin B6. Fortified means that a vitamin or mineral has been added to the food.

Side Effects

Large doses of vitamin B6 can cause:

Deficiency of this vitamin can cause:

(Vitamin B6 deficiency is not common in the United States.)

Recommendations

The Recommended Dietary Allowance (RDA) for vitamins reflects how much of each vitamin people should receive on a daily basis. The RDA for vitamins may be used to help create goals for each person.

How much of each vitamin is needed depends on a person's age and gender. Other factors, such as pregnancy and illnesses, are also important. Ask your health care provider which amount is best for you.

Dietary Reference Intakes for vitamin B6:

Infants

*Adequate intake (AI)

Children

Adolescents and adults

The best way to get the daily requirement of essential vitamins is to eat a balanced diet that contains a variety of foods.

Related Information

Antibody
Protein in diet

References

Mason JB. Vitamins, trace minerals, and other micronutrients. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 218.

Salwen MJ. Vitamins and trace elements. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 23rd ed. St Louis, MO: Elsevier; 2017:chap 26.

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Review Date: 2/2/2019  

Reviewed By: Emily Wax, RD, CNSC, University of Virginia Health System, Charlottesville, VA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

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