The intricate and bidirectional relationship between nutrition and oral health is a cornerstone of modern preventive medicine. Diet is a primary etiological factor in the most prevalent oral diseases, including dental caries, periodontal disease, and dental erosion, while compromised oral health status directly impairs nutritional intake and systemic well-being. Despite overwhelming scientific evidence and consensus from global health organizations, a significant gap persists between the recognized importance of nutrition and its integration into dental education curricula worldwide. This review provides an evidence-based analysis of the current state of nutrition education in dental schools, its impact on clinical practice, and the future directions for reform. A comprehensive review of the scientific foundations reveals the specific roles of macro- and micronutrients in oral tissue homeostasis and the pathophysiology of oral diseases. A global analysis of dental curricula indicates a widespread deficiency in dedicated, clinically relevant nutrition instruction, characterized by insufficient hours, a lack of standardized competencies, and a shortage of faculty with expertise in applied nutrition. This educational deficit translates into a dental workforce that, while acknowledging the importance of nutrition, often lacks the confidence and skills to provide effective patient counseling. Clinician, patient, and system-level barriers further impede the implementation of nutritional interventions in practice. This review examines evidence-based pedagogical models poised to address these deficiencies, including competency-based frameworks, spiral curricula, and interprofessional education (IPE) programs that foster collaboration between dentistry, dietetics, and other health disciplines. Technology and artificial intelligence are also emerging as powerful tools to enhance both education and patient communication. Based on this synthesis, a series of actionable recommendations are proposed for educational institutions, accreditation bodies, clinicians, and researchers. The central conclusion is that the effective integration of nutrition into dental curricula is not merely an addition to an existing program but a fundamental paradigm shift necessary to equip future oral health professionals for a role in comprehensive, preventive, and integrated health care.