Description
A vitamin D 1,25 hydroxy blood test, also known as a 1,25-dihydroxyvitamin D (DHVD) test, is used to diagnose disorders that affect calcium metabolism. It can also help assess vitamin D status in people with certain conditions, such as kidney disease or hypercalcemia.
Why it's done
- To diagnose disorders that affect calcium metabolism
- To assess vitamin D status in people with certain conditions, such as kidney disease or hypercalcemia
When it's done
- A health care provider may order this test if they suspect a bone or other health condition could be caused by low vitamin D levels
- It may be needed to diagnose disorders that affect calcium metabolism
What it shows
- Elevated levels of 1,25(OH)2D can be caused by extrarenal 1α-hydroxylation or hereditary vitamin D-resistant rickets
- Low levels of 25(OH)D can be caused by dietary deficiency, poor absorption, or impaired metabolism
Fasting not required.
