Why Get Tested?
To determine if you have a vitamin D deficiency; if you are receiving vitamin D supplementation, to determine if it is adequate.
When to Get Tested?
When you have an abnormal calcium, phosphorus, and/or parathyroid hormone level; when you have evidence of bone disease or bone weakness; when you are at high risk of deficiency or a healthcare practitioner suspects that you might have a vitamin D deficiency; prior to starting drug treatment for osteoporosis; periodically to monitor treatment of vitamin D deficiency.
A blood sample drawn from a vein in your arm.
Test Preparation Needed?