Often eat some foods that are conducive to hair care and blackening, such as coarse sugar, bean products, fresh vegetables, fruits, seafood, eggs and other foods, and increase the raw materials for synthesizing melanin. Traditional Chinese medicine believes that "hair is blood" and "kidney governs bone, and its flowers are in hair", and advocates eating more foods that nourish blood and kidney to moisten hair, such as walnuts, black sesame seeds, black beans, black dates and black fungus.