Vitamin B12 // Cyanocobalamin

Vitamin B12 Intake Recommendations

I 1993, the European Scientific Committee for Food set population reference intakes (PRI) for vitamin B12 in micrograms (mcg) per day (26):

 Age   Males: mcg/dayFemales: mcg/day
 6–12 months0.50.5
 1–3 years0.70.7
 4–6 years0.90.9
 7–10 years1.01.0
 11–14 years1.31.3
 15–17 years1.41.4
 18 years and older1.41.4

In 1998, the U.S. Food and Nutrition Board set recommended dietary allowance (RDA) values for vitamin B12 that should meet the dietary requirement (27):

 Life Stage  Age Males: (mcg/day)Females: (mcg/day)
 Infants0–6 months0.4 (AI)0.4 (AI)
 Infants 7–12 months0.5 (AI)0.5 (AI)
 Children  1–3 years0.90.9
 Children 4–8 years1.21.2
 Children9–13 years1.81.8
 Adolescents14–18 years2.42.4
 Adults19-50 years2.42.4
 Adults51 years and older2.4*2.4*
 Pregnancyall ages-2.6
 Breast-feedingall ages-2.8

* Because of the increased risk of food-bound vitamin B12 malabsorption in older adults (see Deficiency), adults over 50 years of age are recommended to get most of the RDA from fortified food or vitamin B12-containing supplements (27).

Vitamin B12 is an exceptional B-vitamin as it can be stored in significant amounts, especially in the liver and the kidney. 

For a detailed overview of recommended daily intakes (PRIs/RDAs) of vitamins and minerals for adults derived from different countries and organizations see PDF.

Authored by Dr Peter Engel in 2010, reviewed and revised by Angelika Friedel on 29.06.2017