Vitamins D2 and D3, which are derived from foods and synthesized in the skin, are converted to 25-hydroxyvitamin D2 (25(OH)D2) and
25-hydroxyvitamin D3 (25(OH)D3) in the liver.
Serum
25-hydroxyvitamin D3 [25(OH)D3] level lower than 20 ng/mL is defined as vitamin D deficiency.
Vitamin D is a fat-soluble vitamin absorbed from dietary or cutaneous routes with multiple functions [6], which can be well measured by the level of serum
25-hydroxyvitamin D3 (25(OH)D3) [7].
Prediction of the risk of coronary arterial lesions in Kawasaki disease by serum
25-hydroxyvitamin D3. Eur J Pediatr 2014;173:1467-71.
Serum
25-hydroxyvitamin D3 concentrations and prevalence of cardiovascular disease among Type 2 diabetic patients.
The Vitamin D 200M Assay for the Topaz System is intended for in vitro diagnostic use in the quantitative determination of total 25-hydroxyvitamin D (25-OH-D) through the measurement of
25-hydroxyvitamin D3 (25-OH-D3) and 25-hydroxyvitamin D2 (25-OH-D2) in human serum using LC-MS/MS technology by a trained laboratory professional in a clinical laboratory.
The vitamin D content of food is composed of the parent vitamin D, cholecalciferol (vitD3) and ergocalciferol (vitD2), and the metabolites,
25-hydroxyvitamin D3 (25OHD3) and 25-hydroxyvitamin D2 (250HD2).
Ragab, "
25-hydroxyvitamin D3 deficiency and vitamin D receptor polymorphisms in Egyptian patients with Behcet's disease: a pilot study," International Journal of Clinical Rheumatology, vol.
However, in patients with cancer, 1alpha-hydroxylase-mRNA levels correlate well with serum 1alpha,25-dihydroxyvitamin D3 concentration and the ratio of 1-alpha,25-dihydroxyvitamin D3 to
25-hydroxyvitamin D3 but not with calcium metabolism [16].
Vitamin D-dependent rickets type 1A (VDDR-1A) (Online Mendelian Inheritance in Man #264700) is an inborn error of vitamin D metabolism involving defective conversion of
25-hydroxyvitamin D3 [25(OH) D3] to the active form 1,25-dihydroxyvitamin D3 [1,25[(OH).sub.2][D.sub.3]] by the enzyme 25(OH) D-1-hydroxylase (1).
Association between serum concentrations of
25-hydroxyvitamin D3 and periodontal disease in the US population.