united_statesDietary Reference Intakes for Vitamin B12(Cyanocobalamin) in United States

Men

Age AI RDA UL
0 - 6 months 0.4 μg - -
7 - 12 months 0.5 μg - -
1 - 3 years - 0.9 μg -
4 - 8 years - 1.2 μg -
9 - 13 years - 1.8 μg -
14 - 18 years - 2.4 μg -
19 - 30 years - 2.4 μg -
31 - 50 years - 2.4 μg -
51 - 70 years - 2.4 μg -
70 years and abobe - 2.4 μg -

Women

Age AI RDA UL
0 - 6 months 0.4 μg - -
7 - 12 months 0.5 μg - -
1 - 3 years - 0.9 μg -
4 - 8 years - 1.2 μg -
9 - 13 years - 1.8 μg -
14 - 18 years - 2.4 μg -
19 - 30 years - 2.4 μg -
31 - 50 years - 2.4 μg -
51 - 70 years - 2.4 μg -
70 years and abobe - 2.4 μg -

Pregnant Women

Age AI RDA UL
14 - 18 years - 2.6 μg -
19 - 30 years - 2.6 μg -
31 - 50 years - 2.6 μg -

Lactating Women

Age AI RDA UL
14 - 18 years - 2.8 μg -
19 - 30 years - 2.8 μg -
31 - 50 years - 2.8 μg -


Source: Dietary Reference Intakes (DRIs): Recommended Intakes for Individuals, Food and Nutrition Board, Institute of Medicine, National Academies, 2004, retrieved 2009