While not as common as other types of rice, black rice is the highest in antioxidant activity and contains more protein than brown rice. As such, eating it may offer several health benefits, including boosting eye and heart health, protecting against certain forms of cancer, and aiding weight loss. Black rice is more than just a nutritious grain. When cooked, its deep purple color can turn even the most basic meal into a visually stunning dish. The rice is flattened (aval).