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more general categories information about this item 13. Food and Nutrition 13. Food and Nutrition Food and Nutrition (85) Nutrition (7) description: USDA ARS Food and Nutrient Database for Dietary Studies (FNDDS) is a database of foods, nutrient values, and weights for typical food portions. FNDDS is used to analyze data from the survey "What We Eat in America" (WWEIA), the dietary intake component of National Health and Nutrition Examination Survey (NHANES). USDA National Nutrient Database for Standard Reference (SR) is source of underlying food composition data. AFDSI created an USDA FNDDS ontology to integrate USDA FNDDS data. complete name: USDA Food and Nutrient Database for Dietary Studies