Research published in the Journal of Agriculture and Food Chemistry indicates that black beans are as rich in antioxidant compounds called anthocyanins as grapes and cranberries, fruits long considered antioxidant superstars.
When researchers analyzed different types of beans, they found that, the darker the bean's seed coat, the higher its level of antioxidant activity. Gram for gram, black beans were found to have the most antioxidant activity, followed in descending order by red, brown, yellow, and white beans.
Overall, the level of antioxidants found in black beans in this study is approximately 10 times that found in an equivalent amount of oranges, and comparable to that found in an equivalent amount of grapes or cranberries.Taken from http://www.whfoods.com/
This picture below is my entry to Click Event: Beans and Lentils hosted by Bee and Jai.