This study examines a conceptual model linking individual cognitive-behavioral and familial influences to adolescents' poor diet control as a health-risk behavior. A cross-sectional survey collected data from students enrolled in the secondary schools of the Middle Transylvanian Region, Romania (N = 1977). Self-administered questionnaires were used for data collection. Logistic regression analyses revealed that future-orientation, self-regulation, life purpose, parenting style and parental support were all significant protective factors against adolescents' poor diet control. While both individual and familial variables act as protection for girls and younger adolescents, for boys and older adolescents, only parental variables are significant.