The Management of diabetes mellitus (DM) remains an enigma even though the symptoms of the disease had been described more than 3000 years ago. This is because the central therapeutic goal of DM therapy, euglycemia, is influenced by complex physiologic and pathologic processes, some of which are clearly understood, while others are less clear. Suboptimal glycemic control is a recognized risk factor for acute and chronic complications of diabetes including microvascular and macrovascular diseases. The central question for this editorial is whether mild hepatic dysfunction could impair vitamin D metabolism and secondarily lead to sub-optimal glycemic control.