Nutrition Data : The information in Nutrition Data’s database comes from the USDA’s National Nutrient Database for Standard Reference and is supplemented by listings provided by restaurants and food manufacturers. The source for each individual food item is listed in the footnotes of that food’s Nutrition Facts page. In addition to food composition data, Nutrition Data also provides a variety of proprietary tools to analyze and interpret that data. These interpretations represent Nutrition Data’s opinion and are based on calculations derived from Daily Reference Values (DRVs), Reference Daily Intakes (RDIs), published research, and recommendations of the FDA.