Vitamin D, 25-Hydroxy
This test gives an indication of the vitamin D status of an individual. A deficiency in vitamin D leads to a bone disorder called rickets.
Vitamin D is one of the water-soluble vitamins that is required for the healthy formation and maintenance of teeth and bones. Vitamin D can be made in the body when exposed to sunlight, but is also supplemented in the diet. There are two major forms of the vitamin, 1,25 dihydroxyvitamin D and 25 hydroxyvitamin D. 25 hydroxyvitamin D is the inactive form of the vitamin which is converted by the liver and kidney into the active from. This is the form which is frequently measured, because of the higher amounts in the body and the long half-life. It gives an indication of the vitamin D status of an individual. A deficiency in vitamin D leads to a bone disorder called rickets.
This test is performed in following conditions such as:
• Low calcium
• Bone malformation in children (rickets)
• bone weakness, softness, or fracture in adults (osteomalacia)
• If diagnosed for osteoporosis
Also Known As: 25-Hydroxycalciferol
Fasting is preferred but not required.
Estimated Time Taken
Turnaround time for this Vitamin D blood test is typically 1-3 business days.