When both essence and blood are abundant in the kidneys, our hair receives sufficient nourishment and will appear lustrous, healthy and thick. Foods that nourish the kidneys are generally dark or black in colour such as dark fruits and vegetables, black soybean, black sesame seeds, black fungus, fleece flower root, privet seeds. Since the water element dominates the kidneys, food from the sea such as fish, shellfish, seaweed, kelp, roe, and sea salt in moderation are excellent food supports.