CYP27B1 and cardiovascular disorder: In the present study, we analyzed the CYP2R1, CYP27A1, and CYP27B1 genetic polymorphisms and their association with anthropometric parameters, concentrations of 25(OH)D2, 25(OH)D3, 3-epi-25(OH)D2, 3-epi-25(OH)D3, and 1,25(OH)2D3, in Polish patients with cardiovascular disease and healthy subjects.