Compared to control subjects, patients with diabetic nephropathy (DN) had a significantly higher body mass index (BMI), level of fasting insulin, fasting blood sugar (FBS), total cholesterol (TC), triglyceride (TG), low‐density lipoprotein cholesterol (LDL‐C) and creatinine as well as lower intakes of energy, carbohydrates, mono—and polyunsaturated fatty acids, fiber, and cholesterol compared to controls. Here, INS is linked to diabetic kidney disease.