Abstract : Type 1 diabetes (T1D) is a common disease in children and adolescents, characterized by a high prevalence of patients with poor glycemic control (GlyC). Well-conducted nutrition education (NE) is one of the key elements of treatment for T1D. This research focuses on the evaluation the impact of two methods of NE on anthropometric parameters, GlyC, lipid profile and dietary intake. The study was conducted over 6 months, including a sample of 110 children and adolescents, aged 15 years or younger with T1D. A structured questionnaire was used to collect information on sociodemographic status. Weight, height, and waist circumference were measured and Waist-to-Height ratio (WHtR) and body mass index (BMI) were calculated. HbA1c and lipid profile were determined. Food intake was assessed using two 24-hour recalls. Participants were divided into two groups: a collective group (CG=54) that received a collective NE and another group that received an individual NE (IG=56). A significant reduction of the studied parameters (HbA1c, WHtR, and BMI) was observed after 3 and 6 months in both groups. After 6 months, a significant increase in HDL, calorie, carbohydrate, MUFA, PUFA, and fiber intakes and a significant reduction in TC, LDL, lipids, and SFA intakes were observed in both groups. In the IG, the contribution to total energy of carbohydrate intake was 50.61%, that of protein was about 15.50%, and that of fat intake was about 34%, which is in line with recommendations. Individual NE has proven to be the most effective method in improving HbA1c and dietary intake in poor GlyC T1D patients.