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25-hydroxy vitamin D

Alternative names:

25-OH vitamin D

Normal values:

The normal range is 16.0 to 74.0 ng/ml.

Note: ng/ml = nanograms per milliliter

What abnormal results mean:

Since hydroxylation of 25-hydroxy vitamin D to 1,25-dihydroxy vitamin D takes place in the kidneys, the accumulation of 25-hydroxy vitamin D is an indication of kidney disease. If this condition is allowed to persist, the affected individual will develop secondary hyperparathyroidism. This situation can be avoided by the injection of 1,25-dihydroxy vitamin D.


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