In 1973 the Food and Drug Administration (FDA) took the first steps to establish the current U.S. framework for the nutrition labeling of foods. The Federal Food, Drug, and Cosmetic Act (FD&C Act) and the Fair Packaging and Labeling Act are the Federal laws governing food products under FDA’s jurisdiction. The Nutrition Labeling and Education Act (NLEA), which amended the FD&C Act requires most foods to bear nutrition labeling and requires food labels that bear nutrient content claims and certain health messages to comply with specific requirements.
On-line guidance for the nutritional labeling and health claims related to citrus products is available from several internet sites.
Nutrition facts for Orange Juice, Grapefruit Juice and Fresh Fruit
FDA Guidance for Industry — FDA Food Label Guidance Documents
USDA Nutrient Data Base
USDA Food Safety and Inspection Service