Vitamin D3 (25 OH)

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Vitamin D3 (25 OH) is a blood test conducted to examine vitamin D deficiency.

What is the Vitamin D3 (25 OH) test?

Vitamin D3 (25 OH) is a lab test to examine the level of vitamin D in the body, which is essential for the body to function. Vitamin D is a nutrient that is vital for healthy bones and teeth. There are two types of vitamin D which are essential for nutrition: vitamin D2 and vitamin D3. In the bloodstream, vitamin D2 and vitamin D3 change into a form of vitamin D called 25 hydroxyvitamin D or 25(OH) D. The vitamin D blood test examines the level of 25(OH)D in the blood.

Why is the Vitamin D3 (25 OH) test suggested?

The Vitamin D3 (25 OH) test is suggested in the following cases:

  • When there is an abnormal level of calcium, phosphorus, and/or parathyroid hormone.
  • If there is evidence of bone disease or bone weakness.
  • Before starting treatment for
  • To monitor the treatment for vitamin D deficiency

The Vitamin D3 (25 OH) test is also suggested when the patient is at high risk of deficiency or the healthcare practitioner believes that the patient may have a vitamin D deficiency.

How is the Vitamin D3 (25 OH) test performed?

In the Vitamin D3 (25 OH) test, a blood sample is drawn from a vein in the arm.

What are the parameters measured in the Vitamin D3 (25 OH) test?

The normal range of the total 25(OH)D level is 20-100 ng/mL.

Preparation before performing the Vitamin D3 (25 OH) test

There is no special preparation needed before Vitamin D3 (25 OH).

Post-care after the Vitamin D3 (25 OH) test

No special care is required post the sample for testing has been given.

Sample types in the Vitamin D3 (25 OH) test

A blood sample is required for the Vitamin D3 (25 OH) test.

Side effects/risks of the Vitamin D3 (25 OH) test

There are no risks associated with having blood drawn in Vitamin D3 (25 OH). The patient may feel lightheaded in the worst-case scenario.

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