Vitamin D, 25-OH, Total; Vitamin D, 25-OH, D3; Vitamin D, 25-OH, D2
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 the liver. A 25-OH vitamin D deficiency can lead to bone diseases such as rickets and osteomalacia. Above normal levels can lead to hypercalcemia. This assay employs liquid chromatography tandem mass spectrometry to independently measure and report the two common forms of 25-hydroxy vitamin D: 25-OH D3 - the endogenous form of the vitamin and 25-OH D2 - the analog form used to treat 25-OH Vitamin D3 deficiency.
Fasting preferred, but not required
1.0 mL Serum from a Red Top Tube in a Plastic Vial
1.0 mL Serum from a SST Gold Top Tube
21 days Ambient - Transport
21 days Refrigerated
21 days Frozen
Allow blood to clot at room temperature. Centrifuge and separate the serum from the cells immediately.
| Vitamin D, 25-OH, Total | 30-100 ng/mL |
| Vitamin D, 25-OH, D3 | Not established |
| Vitamin D, 25-OH, D2 | Not established |
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 the liver. A 25-OH vitamin D deficiency can lead to bone diseases such as rickets and osteomalacia. Above normal levels can lead to hypercalcemia. This assay employs liquid chromatography tandem mass spectrometry to independently measure and report the two common forms of 25-hydroxy vitamin D: 25-OH D3 - the endogenous form of the vitamin and 25-OH D2 - the analog form used to treat 25-OH Vitamin D3 deficiency.
2 to 3 days
00913333
82306