Yes, you're right. The FDA allows the following health claim to be used for marketing "whole grain foods" that "contain 51 percent or more whole grain ingredien

Yes, you're right. The FDA allows the following health claim to be used for marketing "whole grain foods" that "contain 51 percent or more whole grain ingredient(s) by weight per reference amount customarily consumed (RACC)": > Diets rich in whole grain foods and other plant foods and low in total fat, saturated fat, and cholesterol, may help reduce the risk of heart disease and certain cancers. https://www.fda.gov/food/food-labeling-nutrition/health-claim-notification-whole-grain-foods https://www.fda.gov/food/food-labeling-nutrition/health-clai... Products that are 100% whole grain almost always explicitly say "100% whole grain" (or wheat) on the packaging. All foods served in school breakfasts and lunches in the US must be "whole-grain rich" as of the 2014-15 school year, with the presence of the FDA health claim being one of the approved ways to confirm that a food is "whole-grain rich": https://www.fns.usda.gov/tn/whole-grain-resource https://www.fns.usda.gov/tn/whole-grain-resource Subway has always been marketed as a healthy fast food option, but its "9-Grain Wheat" bread was carefully named and advertised without being described as "whole grain" or "whole wheat". Many consumers assumed that "9-Grain Wheat" was whole wheat bread, when the ingredients told a different story before 2014.