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.
Insoluble Fiber. Kidney beans contain more insoluble fiber than other common bean varieties, providing 5.9 grams of insoluble fiber in every cooked 1/2-cup serving. Lentils and pinto beans are also rich sources of insoluble fiber, with lentils providing 4.6 grams in each 1/2-cup and pintos supplying 4.7 grams.