Vitamin B12
What it measures
Vitamin B12 supports red blood cell formation and nerve function, and is absorbed from animal-based foods or supplements.
Often reported in pg/mL. Reference ranges differ between laboratories, ages and sexes, so always compare with the range printed on your own report.
Why it matters
Low B12 can relate to diet, absorption, or certain medications, and is often assessed alongside folate and a complete blood count.
Questions worth asking
- Should this be checked alongside folate and a complete blood count?
- Could diet, medications, or absorption be relevant here?
- Is supplementation or further testing worth discussing?
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Educational information only. Not a diagnosis, not treatment advice, and not a substitute for a licensed healthcare professional.