This course provides comprehensive instruction in nutrition, tobacco use, and marijuana use, with an emphasis on their effects on oral health and dental caries risk. Through lectures, presentations, and guided discussions, students explore the scientific foundations and clinical applications of dietary analysis, tobacco and marijuana use assessment, and CAMBRA-based risk evaluation. The course also examines evidence-based preventive treatment modalities tailored to individual risk profiles. A strong emphasis is placed on practical techniques for promoting oral health, including dietary counseling and tobacco and marijuana cessation strategies designed to support long-term behavior change.