Vitamin D

Also known:

Ergocalciferol (vitamin D2), Cholecalciferol (vitamin D3), Calcidiol and calcifediol (25-hydroxyvitamin D),

systematic name:

25-hydroxyvitamin D (calcidiol) and 1,25 dihydroxyvitamin D (calcitriol)


What sample is required?

The determination is made from a venous blood sample.

Is some kind of prior preparation necessary?

For this test you do not need any special preparation.

Why do the analysis?

To know if there is a vitamin D deficiency; in case of being treated with vitamin D, to determine if vitamin D supplements are appropriate.

When to do the analysis?

If abnormal concentrations of calcium, phosphorus and/or parathyroid hormone are present; in case of presenting evidence of bone disease or weakness; if the doctor suspects that there may be a vitamin D deficiency; prior to starting treatment due to the presence of osteoporosis or to monitor treatment for vitamin D deficiency.

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