Vitamin D deficiency (serum 25-hydroxyvitamin D [25 (OH)D] < 50 nmol/L or 20 ng/ml) is associated with unfavorable skeletal outcomes, including fractures and bone loss. A 25 SPECIMEN REQUIREMENTS: Collect: 5 ml Gold (serum) or Red top tube. Separate serum (min volume required is 0.5 ml) Min. Collection: 1.0 ml whole blood Transport: Refrigerated Stability: After serum separation. Ambient: 24 hours; Refrigerated: 1 week. Frozen: 1 month Unacceptable Conditions: Room Temperature specimens older than 24 hours. Function Deficiency Vitamin D sources Toxicity Contacting a doctor Summary For adults, a level of vitamin D in the blood of 20 nanograms per milliliter (ng/mL) or above is generally Poziom 25(OH)D3 poniżej 30 µg/ml (w niektórych laboratoriach <75 nmol/l) wskazuje na niewystarczającą ilość witaminy D w organizmie. Wartości poniżej 20 µg/ml (<50 nmol/l) są stanem ciężkiego niedoboru, który powinien być leczony ściśle pod kontrolą lekarza. Vitamin D tests, which include immunoassays and liquid chromatography-mass spectrometry LC/MS/MS, measure the level of 25(OH)D, the main form of circulating vitamin D. Optimal levels Vitamin D levels of 30 to 100 ng/mL are considered optimal. In people whose 25(OH)D is 20 to 30 ng/mL (50 to 75 nmol/L), treatment with 600 to 800 international units (15 to 20 micrograms) of vitamin D3 by mouth daily is usually sufficient to maintain levels in the target range. .

vitamin d 25 oh d3 normal range