Hair from black to white is due to the reduction of melanin cells in the hair follicles or filled with air, gray hair in the elderly is a physiological phenomenon. The method of turning gray hair into black hair is as follows: 1, Chinese herbal therapy, Chinese medicine believes that due to damage to the heart and spleen, the lack of qi and blood source of transformation, kidney essence deficiency and other causes of hair loss moistening and gray hair, you can choose to have a kidney, spleen, qi and blood Chinese medicine decoction. 2, food therapy, with the prevention or delay the generation of gray hair food black sesame, black beans, peanuts, walnuts, wolfberry, etc.. Pay attention to a light diet, eat more protein-rich food, drink more water, do not eat spicy and stimulating food, do not drink coffee, strong tea, do not eat fried food, do not consume too much sweet food, do not smoke, scientific drinking, do not stay up late, proper exercise.