Good source of fiber. 6 g of protein. 19 g whole grain per bun. Heart healthy. Nutrition Notes: 100 calories per bun. 19 g of whole grain per bun. 2 g of fiber per bun. 6 g of protein per bun. Soft. Delicious. Nutritious. An American classic. Wonder has been a delicious part of American meals for generations. Soft texture. Unbeatable taste. Wonder offers buns to satisfy every generation in your family. And because they're from Wonder, you know they're soft and delicious. Wonder 100% Whole Wheat buns are nutritious too with a full serving of whole grains in each delicious bun. Heart Healthy: 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. 100% Whole Grain: 19 or more per serving. Eat 48 g or more of whole grains daily.