Hypomagnesemia is common in diabetic subjects, and is especially common in poorly controlled diabetes, suggesting that diabetes low serum magnesium status is osmotic diuresis-dependent. To assess the relationship between serum magnesium and HDL-cholesterol concentration adjusted by serum glucose values. We assessed the serum magnesium levels of 50 controlled (HbA(1c)/=126 mg/dl) type II diabetic patients, 40 subjects with impaired fasting glucose (IFG) (FPG>/=110 mg/dl and