Recommended dietary allowances for Vitamin B12

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  • For Indians
Group Particulars RDA (mg/day)
Men Sedentary Work 1
Moderate Work
Heavy Work
Women Sedentary Work 1
Moderate Work
Heavy Work
Pregnant Woman 1.5
Lactation
     0-6 months 1.5
     6-12 months 1.5
Infants 0-6 months 0.2
6-12 months 0.2
Children 1-3 years 0.2-1.0
4-6 years 0.2-1.0
7-9 years 0.2-1.0
Boys 10-12 years 0.2-1.0
Girls 10-12 years 0.2-1.0
Boys 13-15 years 0.2-1.0
Girls 13-15 years 0.2-1.0
Boys 16-18 years 0.2-1.0
Girls 16-18 years 0.2-1.0
  • For U.S. residents 
Life Stage Group RDA (μg/day)
Infants
0-6 months 4 (AI*)
7-12 months 5 (AI*)
Children
1-3 y 0.9
4-8 y 1.2
Males
9-13 y 1.8
14-18 y 2.4
19-30 y 2.4
31-50 y 2.4
51-70 y 2.4#
>70 y 2.4#
Females
9-13 y 1.8
14-18 y 2.4
19-30 y 2.4
31-50 y 2.4
51-70 y 2.4#
>70 y 2.4#
Pregnancy
     £18 y 2.6
      19-30 y 2.6
      31-50 y 2.6
Lactating
      £18 y 2.8
      19-30 y 2.8
      31-50 y 2.8

*Abbreviations       AI  =   Adequate intake        #   Because 10% to 30% of older people may mal – absorb food-bound vitamin B12, it is             advisable for those  older than 50 years to meet their RDA mainly by consuming foods             fortified with vitamin B12 or a  supplement containing vitamin B12.