The system consists of V Cube^® (reader) and VCube Strip^® (immunochromatographic strips) for the quantitative measurement of Vitamin D in capillary blood. The main role of vitamin D is to regulate the intestinal absorption of calcium and phosphorus, promoting normal bone formation and mineralization. Furthermore, vitamin D is involved in the process that ensures normal muscle contractility, as well as interacting with the immune system by exerting an immunomodulatory effect.