25-OH VD3 Recombinant Rabbit mAb (SDT-321-345)

25-hydroxyvitamin D3 (25-OH D3) is the major circulating form of vitamin D and the preferred biomarker for assessing overall vitamin D status. It is measured in serum or plasma, typically via immunoassay or liquid chromatography-tandem mass spectrometry (LC-MS/MS). This diagnostic test quantifies the body's vitamin D reserves, reflecting both cutaneous synthesis and dietary intake. It is crucial for evaluating deficiency, insufficiency, sufficiency, or toxicity. Results guide clinical decisions in managing bone health (e.g., osteoporosis, rickets), and are increasingly used in research linking vitamin D to immune, cardiovascular, and metabolic disorders. Consistent and accurate measurement remains essential for reliable diagnosis and therapeutic monitoring.