Dietary Reference Intakes for Vitamin B12 (Cyanocobalamin) in United States (per day)

Males EAR RDA AI
0-6 months - - 0.4 μg
7-12 months - - 0.5 μg
1-3 years 0.7 μg 0.9 μg -
4-8 years 1 μg 1.2 μg -
9-13 years 1.5 μg 1.8 μg -
14-18 years 2 μg 2.4 μg -
19-30 years 2 μg 2.4 μg -
31-50 years 2 μg 2.4 μg -
50-70 years 2 μg 2.4 μg -
70 years and older 2 μg 2.4 μg -
Females EAR RDA AI
0-6 months - - 0.4 μg
7-12 months - - 0.5 μg
1-3 years 0.7 μg 0.9 μg -
4-8 years 1 μg 1.2 μg -
9-13 years 1.5 μg 1.8 μg -
14-18 years 2 μg 2.4 μg -
19-30 years 2 μg 2.4 μg -
31-50 years 2 μg 2.4 μg -
50-70 years 2 μg 2.4 μg -
70 years and older 2 μg 2.4 μg -
Pregnancy EAR RDA AI
less than 18 years 2.2 μg 2.6 μg -
19-30 years 2.2 μg 2.6 μg -
31-50 years 2.2 μg 2.6 μg -
Lactation EAR RDA AI
less than 18 years 2.4 μg 2.8 μg -
19-30 years 2.4 μg 2.8 μg -
31-50 years 2.4 μg 2.8 μg -
Reference: Dietary Reference Intakes (DRIs): Recommended Intakes for Individuals, Food and Nutrition Board, Institute of Medicine, National Academies, 2010