Vitamin B12 (Cobalamin)
What is it?
Vitamin B12 is essential for red blood cell formation and nervous system function. Deficiency causes anemia and neurological symptoms.
Normal ranges
200–900 pg/mL. Below 200 — deficiency.
Units: pg/mL
Causes of deviations
Low levels:
Vegan diet, pernicious anemia, malabsorption, aging.
High levels:
Liver disease, myeloproliferative disorders.
When to see a doctor
If below 200 pg/mL or with neurological symptoms.
This information is for educational purposes and does not replace medical advice.
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