A double-blind study is one in which neither the participants nor the experimenters know who is receiving a particular treatment. This procedure is utilized to prevent bias in research results.
Total Dietary Fiber. Kidney beans contain more total dietary fiber per serving than the seven other most commonly consumed legumes in the United States, including black-eyed peas, chickpeas, lentils and black, navy, pinto and lima beans.
Black beans are no exception. From a single, one-cup serving of black beans you get nearly 15 grams of fiber and over 15 grams of protein. Moreover, black beans rank in our Top 10 foods for fiber and our Top 25 foods for protein.