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Vitamin B2 (Riboflavin) Test

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About Our Vitamin B2 (Riboflavin) Test

Note: Fasting is not required for this test.

Vitamin B2, also called riboflavin, is important for energy production, enzyme function, and normal fatty acid and amino acid synthesis. It is also necessary for the reproduction of the antioxidant glutathione.

Vitamin B2 is water-soluble like the reset of the B vitamins. It is not stored in ample amounts and excess is typically lost through urination, causing bright yellow urine, meaning a constant supply of vitamin B2 is needed. Deficiency in this vitamin is usually part of a multiple-nutrient deficiency and does not occur in isolation.

Deficient B2 levels can lead to:

  • Sore/red tongue
  • Cheilosis (chapping/fissuring of lips)
  • Oily, scaly skin rashes on scrotum, vulva or philtrum of lips

Vitamin B2 deficiency is also associated with the following birth defects or developmental abnormalities:

  • Cleft lip and palate
  • Retardation of growth in infants and children
  • Congenital heart defects

Major sources of vitamin B2 include:

  • Fortified cereals and grains
  • Milk, yogurt, cheeses
  • Dark green vegetables (broccoli, spinach, asparagus)
  • Meat

Vitamin B2 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

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