http://www.cfsan.fda.gov/label.html
Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration
These FDA Food Labeling web pages address the labeling requirements for foods under the Federal Food Drug and Cosmetic Act and its amendments. Food labeling is required for most prepared foods, such as breads, cereals, canned and frozen foods, snacks, desserts, drinks, etc. Nutrition labeling for raw produce (fruits and vegetables) and fish is voluntary.