Lentils for supper health, and black lentils are no exception. Here is a full blog post about their nutrition facts and health benefits. One serving of black lentils made from ¼ cup of dry seeds (1/2 cup of cooked) contains 12 grams of protein. They are packed with fiber at 9 grams per serving and 23 grand of carbs. You get all that for just 180 calories and .5) . Black lentils also deliver potassium, iron, magnesium, zinc and folate. Black lentils contain antioxidants, such as anthocyanins, which give them their dark color. Antioxidants help protect cells from damage caused by harmful free radicals. Numerous studies have shown that the consistent consumption of lentils is associated with improved health outcomes and a reduced risk of chronic diseases such as diabetes, obesity, heart disease, and certain types of cancer, including breast cancer.