What This Value Measures
Vitamin D is important for bones, muscles and the immune system and is produced with the help of sunlight. The storage form 25-OH-vitamin-D is measured.
Elevated Value
Very high values usually only occur through highly overdosed supplements.
Low Value
A decreased value may indicate vitamin D deficiency, especially during the winter months.
Note: Values are often lower during the dark season.
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.