Black food is generally rich in trace elements and vitamins, such as what we usually call "five categories of black", including black rice, black beans, black sesame seeds, black dates and walnuts.
In addition, there are plums, black-bone chicken, dark plum, laver, chestnut, sea cucumber, mushrooms, kelp, black grapes and so on. , is also a very nutritious food. People in kidney is not good can eat sea cucumber with scallion once a week, stir-fry black fungus and mushrooms together, or stew chestnuts, which are all good ways to tonify the kidney.