Obesity is a chronic illness and multifactorial etiology, related to genetic factors, environmental and behavioral. Features association with several metabolic abnormalities in childhood, leading to increased risk of cardiovascular disease in adult life. The treatment involves lifestyle change, with balanced diet guidance and encouraging physical activity. The treatment in this age group have brought limited data, in addition to high drop-out rates. A unique type of food guidance is the equivalent calorie count, where calories are converted into points. The objective of this study was to evaluate the variance of Z score of body mass index (ZIMC) of obese adolescents undergoing orientation of two groups of low-calorie diet: traditional and based on the points system, as well as evaluate anthropometric variables, body composition, food intake, metabolic changes and self-monitoring.