Overview of Vitamin D (25-OH)
What is Vitamin D (25-OH)?
This test is done when you have abnormal calcium, phosphorus or parathyroid hormone; when you have evidence of bone disease; when you have high risk of vitamin D deficiency; prior to starting drug treatment for osteoporosis; and periodically to monitor treatment of vitamin D deficiency.
The sample type collected for Vitamin D (25-OH) is: Blood
Preparation for Vitamin D (25-OH)
- No special preparation required
Why Get Tested for Vitamin D (25-OH)?
- If you have symptoms of vitamin D deficiency like bone malformation in children (rickets), bone weakness or fractures in adolts (osteomalacia)
- If you have an abnormal calcium, phosphorus or parathyroid hormone
- If you have risk factors for vitamin D deficiency like old age, limited sun exposure, obesity
- If you have undergone gastric bypass surgery
- As a part of vitamin profile or routine health check up
- Prior to starting drug treatment for osteoporosis
What Results of Vitamin D (25-OH) mean?
- Low level of vitamin D3 can be due to the following causes: if you are not taking a balanced diet, your intestines are not absorbing the vitamin properly, you are not exposed to enough sunlight
- High level may be due to excess supplementation from vitamin pills or other nutritional products