|Age||Males: mcg/day||Females: mcg/day|
|18 years and older||1.4||1.4|
|Life Stage||Age||Males: (mcg/day)||Females: (mcg/day)|
|Infants||0–6 months||0.4 (AI)||0.4 (AI)|
|Infants||7–12 months||0.5 (AI)||0.5 (AI)|
|Adults||51 years and older||2.4*||2.4*|
* 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