Rice & Beans (Man cannot live on Rice & Beans Alone, but can he?)

The complete protein

One cup of rice and black beans has 12 grams of protein and 10 grams of fiber, compared with a cup of chicken and rice which has less than 1 gram of fiber. These two foods are among the oldest foods known to humankind. The combination of beans and rice creates a complete protein. Beans alone and rice alone both lack certain essential amino acids. Complete proteins contain full doses of all nine essential amino acids, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.