Reconceptualizing Teacher Professional Competence through Medical Biochemistry: A Biopsychological Framework Linking Biochemical Health, Cognitive Function, and Educational Effectiveness

Teacher professional competence has traditionally been theorized through pedagogical, cognitive, and motivational lenses, treating biological health as a peripheral concern rather than a core determinant of instructional capacity. This paper proposes a biopsychological reconceptualization of teacher competence that positions medical biochemistry-specifically micronutrient status, hormonal regulation, gut-brain signaling, sleep architecture, and stress-biomarker profiles-as a foundational layer underlying cognitive function and, by extension, classroom effectiveness. Drawing on peer-reviewed research published between 2020 and 2025 across educational psychology, endocrinology, nutritional science, and microbiome research, the paper synthesizes evidence linking biochemical dysregulation to impairments in working memory, attention, emotional regulation, and decision-making-the same cognitive-affective resources teachers draw on moment-to-moment in instructional practice. The paper proposes a biopsychological framework that models teaching competence as emerging from the interaction of biochemical health, cognitive-affective function, and pedagogical skill. The paper argues that teacher training, occupational wellness policy, and school-level health infrastructure should treat biochemical health as a professional-competence variable rather than a private lifestyle matter. It outlines practical implications for teacher education programs, occupational health policy, and future interdisciplinary research.