The USDA National Nutrient Database for Standard Reference (SR) is the major source of food composition data in the United States. It provides the foundation for most food composition databases in the public and private sectors. As information is updated, new versions of the database are released. Individual food reports or Nutrient lists for selected foods and nutrients. You can select up to three nutrients, sorted either by food description or in descending order by nutrient content in terms of common household measures. You can also limit the search to one several, or all food groups.