Translations:Cholecalciferol/15/en

There are conflicting reports concerning the relative effectiveness of cholecalciferol (D₃) versus ergocalciferol (D₂), with some studies suggesting less efficacy of D₂, and others showing no difference. There are differences in absorption, binding and inactivation of the two forms, with evidence usually favoring cholecalciferol in raising levels in blood, although more research is needed.