Nutritional Quality of School Meals and Packed Lunches

The nutritional quality of meals consumed by school-aged children is shaped by a complex interplay of policy, food environment and socioeconomic factors. School-provided meals are increasingly subject to statutory standards that may be food-based (specifying types of foods or portions) or nutrient-based (setting minimum and maximum levels of energy, macronutrients and micronutrients). Packed lunches, by contrast, are unregulated in most settings and vary widely in composition, often containing higher levels of sugar, sodium and ultra-processed items and fewer vegetables and whole grains. Disparities in dietary quality between school meals and packed lunches have been documented across multiple countries, with implications for childhood growth, cognitive development and long-term health. Interventions range from legislative reform of school food standards to multicomponent educational and environmental approaches aiming to shift both supply and demand. Key challenges include pupil acceptance, kitchen infrastructure, cultural and religious dietary needs, affordability and monitoring compliance. Emerging evidence highlights the capacity of well-designed meal standards and supportive programmes to narrow nutritional and social inequalities, though persistent gaps remain in uptake, taste preferences and sustained behaviour change.

Research from Nature Portfolio

No recent Nature Portfolio content available.

Nutritional Quality of School Meals and Packed Lunches publication trend

The graph below shows the total number of articles in nutritional quality of school meals and packed lunches across all publications each year (not limited to Nature Index journals).

Technical terms

Food-based standards: Requirements specifying types and portions of foods (for example, minimum servings of vegetables or whole grains) without prescribing exact nutrient values.

Nutrient-based standards: Criteria setting target ranges for energy, macronutrients (fat, protein, carbohydrate) and micronutrients (such as vitamins and minerals) in school meals.

Packed lunch: A meal prepared at home and brought to school by pupils, not subject to statutory nutritional regulation.

Universal free school meals (UFSM): Provision of no-cost meals to all pupils regardless of household income, intended to promote equity and reduce food insecurity.

Food insecurity: Limited or uncertain access to adequate and nutritious food, often due to economic constraints or supply limitations.

References

1. Evaluation of school food policies for secondary schools in Europe: Results for health, acceptance, and affordability from a scoping review. Obesity Reviews (2025).
2. A qualitative process evaluation of universal free school meal provision in two London secondary schools. BMC Public Health (2023).
3. Diversity and practice: local decision-making practices on multi-cultural diets for British Muslim school children (BMSC) and implications for social justice. Frontiers in Public Health (2024).