French or Vienna Bread includes Sourdough have 1.4 times more energy per unit of mass than Canned Boston Brown Bread, which is high in comparison to other foods. Canned Boston Brown Bread having above average energy density.
Nutrients data from USDA National Nutrient Database for Standard Reference by US Department of Agriculture, Agricultural Research Service, Nutrient Data Laboratory.
Recommended Dietary Allowances (RDA) compiled from U.S. Department of Health & Human Services , National Institutes of Health.