Mapping Data Availability and Assessing Nutritional Adequacy in Standardised Institutional Feeding: A Cross-National...

Background: Standardized institutional feeding systems determine nutritional adequacy entirely through how the provided diet is formulated, yet how completely that formulation is documented is rarely examined. Military operational rations are the most widely deployed example of such a system. Objectives: We aimed to map the global availability of publicly accessible ration composition data; to assess the compositional adequacy of rations with complete profiles; and to test whether dietary diversity predicts micronutrient adequacy where dietary choice is absent. Methods: A standardized seven-step search was applied across 69 countries grouped into ten geopolitical clusters. All analyses used planned ration composition from official and published sources, not the food actually consumed. Compositional adequacy was quantified as mean per-nutrient coverage of the Dietary Reference Intake, and a separate diversity score was correlated with this aggregate measure. Results: Complete micronutrient profiles were publicly accessible for only 8 of 69 countries (11.6%), with post-conflict states showing the highest data-absence rate (80.0%). Vitamin D was the only nutrient critically low across all eight complete-data rations, ranging from 2.9% to 30.0% of the Dietary Reference Intake-a compositional feature, not a measure of personnel status. The correlation between aggregate adequacy and dietary diversity was negligible (r = -0.042). Pakistan's high aggregate score (90.29%) coexisted with vitamin D at 2.9%, showing how aggregate scores mask single-nutrient deficiencies. Conclusions: Per-nutrient compositional assessment is essential for evaluating standardized institutional feeding; low public data availability does not imply absent nutritional planning.