Raw California Red Kidney Beans have 15 times more energy per unit of mass than Raw Mustard Spinach, which is high in comparison to other foods. Mustard Spinach having very low 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.