Effect of Meal Frequency and Timing on Insulin Dose and Clock Gene in Type 2 Diabetic Patients

The Breakfast Ddiet consist of high-energy breakfast, medium-sized lunch and reduced in energy dinner, with distribution of calories: breakfast 50%, lunch 33% and dinner 17%. In this diet, the investigators will evaluate at baseline and at the end of 12 weeks of diet intervention, the diet efficacy on reducing HbA1c, the total daily insulin dose requirements (TDID), the efficacy on reducing body weight, fasting plasma glucose (FPG) and overall glycemic excursion assessed with continuous monitoring system. The investigators will assess also the Clock Genes mRNA expression in white blood cells. at baseline and after 12 weeks of diet intervention

The 6meal diet (6Mdiet) will consist in the traditional antidiabetic diet, consuming 6 small meals: breakfast, lunch and dinner and 3 snacks, with caloric distribution: breakfast 20%, lunch 25%, dinner 25% and 10% each of the 3 snacks. In this diet, the investigators will evaluate at the beginning and at the end of the study (12 weeks), the diet effects on reducing HbA1c, total daily insulin dose requirements (TDID), and the diet efficacy on reducing body weight, fasting plasma glucose (FPG) and overall glycemic excursion, using continuous monitoring system, The investigators will assess also at baseline and at the end of the diet intervention the Clock Genes mRNA expression in white blood cells.