At a Glance
Why Get Tested?
To investigate a problem related to bone metabolism or parathyroid function, possible vitamin D deficiency, malabsorption and to monitor some patients taking vitamin D.
When to Get Tested?
Your doctor may request a vitamin D measurement in the following situations:
- If you are found to have an abnormal calcium, phosphate, and/or parathyroid hormone (PTH) concentration in the blood.
- As part of the investigation of some forms of bone disease or muscle weakness/pain.
- If you have disease of the gastrointestinal tract that could result in malabsorption.
- If you are receiving certain anticonvulsant drugs.
A blood sample taken from a vein in your arm
Test Preparation Needed?