Clarilab

Vitamins and iron

Vitamin B12 test

Also called B12, cobalamin

A vitamin for nerves and red blood cells.

Typical range
About 200–900 pg/mL (below 300 can be borderline).
Usual recheck
About 3 months when out of range

Why it's done

Low levels are common in vegetarians and with long-term metformin or acid-reducing medicines.

What a high result can mean

Usually from supplements or injections.

What a low result can mean

Tingling or numbness, memory problems, tiredness and anaemia with large red cells.

Got a report with Vitamin B12?

Upload the PDF to Clarilab: it reads the values in your browser, flags anything out of range and tracks your results over time.

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Included in these checkups

Yearly health checkupFeeling tired all the timeDiabetes carePlanning a pregnancy

More vitamins and iron tests

Vitamin DYour body's store of vitamin D, needed for bones, muscles and immunity. Folate (folic acid)A B vitamin for new cells and red blood cells. Serum ironIron circulating in the blood. FerritinYour body's iron store. TIBCHow much iron your blood can carry.