The recommended dietary allowance of vitamin B12 is shown in Table 1. It is important to note that the recommended intake reported in the literature ranges from 2 to 5 mcg/day.9 and 11
The body stores between 2 to 5 mg of vitamin B12 for between 3 and 4 months. Like folic acid, it is mainly stored in the liver.6, 12 and 18