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Impact of School Nutrition Education on Healthy Eating Practices among Secondary School Students in Nigeria

Abstract

Healthy eating during adolescence is important for proper growth, cognitive development, academic performance, and the prevention of nutrition-related health problems. Secondary school students may develop dietary habits that persist into adulthood, yet unhealthy eating practices such as frequent consumption of sugary drinks, highly processed foods, foods high in salt and unhealthy fats, meal skipping, and inadequate consumption of fruits and vegetables may be common among young people. These practices may be influenced by limited nutrition knowledge, peer influence, family eating patterns, food availability, school food environments, advertising, and socioeconomic circumstances. School nutrition education provides an opportunity to improve students' understanding of healthy diets and develop practical skills for making appropriate food choices. Against this background, this study investigates the impact of school nutrition education on healthy eating practices among secondary school students in Nigeria. The study will be anchored on the Health Belief Model, Social Cognitive Theory, and Social Ecological Model. The Health Belief Model explains how students' perceptions of nutrition-related health risks, perceived severity of unhealthy dietary practices, perceived benefits of healthy eating, perceived barriers, and cues to action may influence dietary behaviours. Social Cognitive Theory emphasizes observational learning, self-efficacy, behavioural reinforcement, and environmental influences in the development and maintenance of healthy eating practices. The Social Ecological Model emphasizes the interaction between individual, family, peer, school, community, and broader food-environment factors in shaping adolescents' dietary behaviours. Collectively, these theoretical perspectives provide a suitable framework for explaining how school nutrition education may influence healthy eating practices among secondary school students in Nigeria. The study will adopt a quantitative quasi-experimental or analytical cross-sectional research design. The study population will comprise students enrolled in selected public and private secondary schools across Nigeria. A multistage sampling technique will be used to select geopolitical zones, states, local government areas, schools, classes, and eligible students. School nutrition education will be assessed using indicators such as exposure to structured nutrition education, frequency and duration of educational sessions, knowledge of food groups, balanced diets, portion sizes, dietary diversity, meal planning, food labelling, healthy food preparation, hydration, and the health consequences of excessive intake of sugar, salt, and unhealthy fats. Healthy eating practices will be assessed using indicators such as frequency of fruit and vegetable consumption, dietary diversity, regular meal consumption, appropriate portion sizes, water intake, reduced consumption of sugary drinks and highly processed foods, healthier snack choices, food-label use, and healthy food selection within the school environment. Data will be collected using structured questionnaires, validated nutrition knowledge and dietary practice instruments, food-frequency questionnaires, 24-hour dietary recalls where appropriate, school nutrition programme records, and school food-environment observation checklists. Descriptive statistics will be used to summarize students' characteristics, exposure to school nutrition education, and healthy eating practices. Inferential statistical techniques, including chi-square tests, t-tests, correlation analysis, and logistic or multiple regression analysis where appropriate, will be used to determine the impact of school nutrition education on healthy eating practices. Where a quasi-experimental design is adopted, healthy eating practice scores before and after the educational intervention may be compared with those of a comparison group to determine changes associated with the programme. Diagnostic tests will also be conducted to assess the reliability, validity, and robustness of the findings. The study is expected to find that school nutrition education has a significant positive impact on healthy eating practices among secondary school students in Nigeria. Students exposed to structured and practical nutrition education are expected to demonstrate improved dietary diversity, greater consumption of fruits and vegetables, healthier snack choices, improved hydration practices, and reduced consumption of sugary drinks and highly processed foods. Practical lessons on meal planning, food labels, portion control, food selection, and preparation may strengthen students' ability to apply nutrition knowledge in everyday situations. Interactive activities, peer education, school-based nutrition campaigns, and integration of nutrition messages into the broader school environment may further reinforce healthy eating behaviours. However, food prices, household income, availability of healthy foods, peer influence, school canteen practices, food advertising, cultural preferences, and limited parental involvement may reduce the effectiveness of nutrition education. The study therefore expects comprehensive, practical, age-appropriate, culturally relevant, and regularly reinforced school nutrition education to contribute significantly to improved healthy eating practices among secondary school students in Nigeria. The study is expected to contribute to the literature on school nutrition education, healthy eating practices, adolescent nutrition, school health, dietary behaviour, nutrition knowledge, food literacy, and public health in Nigeria. The findings will provide useful information to the Federal Ministry of Education, Federal Ministry of Health and Social Welfare, Federal Ministry of Agriculture and Food Security, state ministries of education and health, secondary school authorities, nutritionists, teachers, parents, school food vendors, development partners, and policymakers regarding strategies for improving adolescent nutrition. The study will also provide evidence-based recommendations for integrating nutrition education into school curricula and health programmes, strengthening school food environments, improving healthy food availability in school canteens, involving parents in adolescent nutrition education, promoting food-label literacy, and developing sustainable school-based nutrition programmes across Nigeria.

Keywords: School nutrition education, healthy eating practices, secondary school students, adolescent nutrition, nutrition education, dietary behaviour, food literacy, school health, healthy diet, Nigeria, public health.