What This Value Measures
Vitamin B12 is important for blood formation and the nervous system. A deficiency can develop gradually over a longer period of time.
Elevated Value
Elevated values are usually harmless and often due to supplements.
Low Value
A decreased value can lead to anaemia and nerve problems and occurs, for example, with a purely plant-based diet or impaired absorption.
Reference ranges are typical guide values for adults and vary depending on the laboratory, measurement method, age and sex — always compare with the range stated on your own report. A value outside the range does not automatically mean an illness, and a value within the range does not rule one out. The trend and overall picture are usually more informative than a single value. The doctor's assessment is always decisive.