Vitamins
Vitamin B12
A vitamin important for nerve function and red blood cell production.
vitaminsblood-countnutritionnerve
About this biomarker
Vitamin B12 supports DNA synthesis, nerve health, and red blood cell production. Blood B12 testing is commonly used in anemia and deficiency workups.
Why it matters
Low B12 can affect blood counts and nerve function.
What lower levels may suggest
Low B12 may be seen with low intake, malabsorption, autoimmune causes, or medication effects.
What higher levels may suggest
High B12 may be seen with supplementation or, less commonly, certain liver, blood, or inflammatory conditions.
Common tests
Serum vitamin B12, anemia panel, B12 with methylmalonic acid or homocysteine
Related biomarkers
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