Title: Vitamin D 25-hydroxy test: What to expect
Headings: What to expect from a 25-hydroxy vitamin D test
What to expect from a 25-hydroxy vitamin D test
What is a 25-hydroxy vitamin D test?
What to expect
Reasons for testing
Cost of the test
What is the normal range?
How to increase vitamin D
Summary

Content: What to expect
The 25-hydroxy vitamin D test involves providing a blood sample. To take a blood sample, a healthcare provider will first clean the skin on the person’s arm. Then they will draw blood using a needle. When they have collected enough blood, the healthcare provider will remove the needle and apply pressure to the wound. They will then dress it with a Band-Aid or bandage. A 25-hydroxy vitamin D test is safe and usually does not cause side effects. However, some people may feel faint or lightheaded after the test. Others may notice bruising or pain around the needle site, which may last several days. Reasons for testing
Most people in the United States have adequate vitamin D. However, from 2001–2006, about one-quarter
Trusted Source
of adults in the U.S. were at risk of vitamin D deficiency. Low vitamin D can cause a range of problems.