Understand Your Test

Vitamin D Tests

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 Sample Required? A blood sample drawn from a vein in your arm