Introduction: Insulin-like growth factor (IGF)-1 is one of the hormones that plays a role in the growth of adolescent girls. Its level will rise at puberty and begin to decline at the end of puberty. High IGF-1 levels in adult is associated with the incidence of breast cancer. This study aims to know the level of IGF-1 and investigates its relationship with dietary intake, nutritional status, and physical activity of adolescent girls aged 13-15 in Jakarta. Methods: This cross-sectional study used secondary data from a previous study (titled "Determinant Factor Levels of Estradiol, IGF-1, and Early Menarche in Adolescent Girls Aged 13-15 in Jakarta: Nutritional Epidemiology Study Related to Breast Cancer Risk Factors") and primary data from stored blood serum to measure IGF-1 levels by colorimetric method. The secondary data such as dietary intake, anthropometric data, and physical activities were obtained from 178 subjects with a total population sampling method. Results: There was a positive correlation between IGF-1 levels and carbohydrate intake (p=0.041, r=0.153) and a negative correlation between IGF-1 levels and fat intake (p=0.042, r=-0.152). No correlation between IGF-1 and body mass index was found, but there was a tendency that IGF-1 values would increase in overweight and decrease in obesity. IGF-1 levels have nonlinear pattern by carbohydrates intake, fat intake and nutritional status. Conclusion: The adolescent girls should maintain their nutritional status by maintaining diet, choosing the right and balanced foods, as well as increasing physical activities.