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1992-12-06
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Vitamin B2
U.S. Recommended Daily Allowances
Infants (0-12 mo.): 0.6 mg
Children (1-3 years): 0.8 mg
Adults and Children 4 Years +: 1.7 mg
Pregnant or or Nursing Women: 2.0 mg
(The U.S. RDA amounts are sufficient to meet the needs
of practically all healthy people.)
Riboflavin (vitamin B2) is a water-soluble vitamin
that plays a role in energy production.
Functions: Component of two coenzymes that help
convert carbohydrates and protein to energy.
Sources: Meat, poultry and fish; milk and cheese;
enriched cereal-grain products; green vegetables, such as
broccoli, turnip greens, asparagus, and spinach; eggs.
Deficiency: Signs of deficiency include cracks and
sores on the lips and at the comers of the mouth, skin
rash, and dimness of vision. Deficiency is rare in the
United States because most people have adequate intakes.
Excess: High doses appear nontoxic.