The Vitamin D 25-Hydroxy Blood Test is often ordered for individuals that have symptoms of vitamin D deficiency. It may also be ordered before an individual begins osteoporosis drug therapy. Low levels may indicate a dietary deficiency, mal-absorption or lack of exposure to sunlight.

Who should test?

• Vitamin D is clinically useful to diagnose disorders related
• to intestinal malabsorption and vitamin D deficiency or
• intoxication. The 25-Hydroxy vitamin D blood test allows
• monitoring for therapeutic response in patients being
• treated for vitamin D-related disorders.

The body gets vitamin D from two sources: dietary intake through foods and supplements (exogenous), and through production in the skin upon exposure to sunlight (endogenous). Although vitamin D is found naturally in only a few foods, in the United States, many products are supplemented with it, including milk, breakfast cereals and juices. Those at risk of vitamin D deficiency include individuals who are elderly; obese; have dark skin; are institutionalized, home bound or have limited sun exposure; have undergone gastric bypass surgery; and have conditions such as cystic fibrosis and Crohn's disease that interfere with fat absorption.

After placing an order, you will receive a doctor approved lab order by email usually within 20-30 minutes. The emailed Lab Requisition will allow you to go to a local patient collection site to get tested. You will not have to pay any additional lab, collection or doctor's fees.  Most test will normally report within 48-72 hours by secure email. List of collections site can be found using our Lab Locator Tool. If you have any questions please call our offices at 1-844-455-6355 or chat online with a member of our Care Team.