Kidney main black, so black sesame seeds, black beans, black sesame can complement the kidney gas, and the kidney and the main bone marrow, often eat can be healthy brain, strong body. These kinds of food have the role of nourishing yin and tonifying the kidney, long-term use can nourish qi and blood, the role of black hair. At the same time the quality of the body will also have a good conditioning.
But don't overdo it, and don't be partial to food, enrich the variety of meals to avoid malnutrition.