2025年1月27日 · This highly automated test measures both D 2 and D 3 together and reports a total 25-hydroxy vitamin D. Major clinical studies, including (but not limited to) the Centers for Disease Control (CDC) National Health and Nutrition Examination Survey (NHANES) data base, the Women's Health Initiative (WHI) Studies, and the Harvard-Based Health ...

Vitamin D levels <20 ng/mL are considered vitamin D deficient. Vitamin D deficiency may lead to elevated parathyroid hormone (PTH) levels (secondary hyperparathyroidism). If your patients' test results reveal that they are vitamin D deficient, the Endocrine Society recommends that they receive vitamin D supplementation.

Vitamin D, 25-Hydroxy, Total, Immunoassay - Measurement of serum 25-OH vitamin D concentrations provide a good index of circulating vitamin D activity in patients not suffering from renal disease. Lower than normal 25-OH vitamin D levels can result from a dietary deficiency, poor absorption of the vitamin or impaired metabolism of the sterol in ...

Quest offers two methods of vitamin D [25 (OH)D] testing that can help you regularly assess at-risk patients, identify vitamin D deficiency and disorders, and manage deficiency once diagnosed. Note: 1,25 (OH)2D measurement does not reflect vitamin D status.

25-Hydroxy vitamin D is used to measure vitamin D status; it includes results for total 25-hydroxy vitamin D 2 and 25-hydroxy vitamin D 3. This 25-hydroxy vitamin D assay and the alternative immunoassay test (Vitamin D, 25-Hydroxy [081950]) are both CDC-certified for accuracy. 1

What is a vitamin D test? A vitamin D test measures the levels of vitamin D in your blood. Vitamin D helps your body absorb calcium to build healthy bones and teeth. It also helps keep your muscles, nerves, and immune system working normally.

Vitamin D (25 Hydroxy) [VITDG2] is the preferred initial test for assessing vitamin D status in patients without renal disease. This is the main form of vitamin D circulating in the blood; The test assesses for both vitamin D2 and vitamin D3. It is the best indicator of vitamin D deficiency or excess in patients not suffering from renal disease.

This test is the preferred initial test for assessing vitamin D status and most accurately reflects the body's vitamin D stores. In the presence of kidney disease, testing 1,25-dihydroxyvitamin D (DHVD) levels may be needed to adequately assess vitamin D status.

Labcorp OnDemand’s Vitamin D Test measures the level of 25-hydroxy vitamin D in your blood. Vitamin D helps your body regulate calcium metabolism which in turn helps maintain healthy bones, control infections, reduce inflammation and more. Your skin produces vitamin D through sunlight exposure.

The primary form of vitamin D found in the blood is 25-hydroxyvitamin D, which is a relatively inactive precursor to the active hormone 1,25-dihydroxyvitamin D. 25-hydroxyvitamin D is routinely evaluated to assess and monitor vitamin D status in humans due to its longer half-life and higher concentration.