Recommended daily intake (RDI) for vitamin B 12 for people over 14 is 2.4 mcg.
1 Recommended daily intake for vitamin B 12 during pregnancy is 2.6 mcg.
2 RDI of 2.4 mcg for people under 50 years of age is much harder to meet on a vegetarian or vegan diet.
Deficiency symptoms:
1 Include anemia, certain neurological disorders, and reduced growth and healing.
2 Nerve damage, weakness and fatigue, tingling in the hands and feet.
3 Numbness, blurred vision, fever, sweating and difficulty walking.
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