Nourishing the kidneys does not necessarily make the hair darker, but by nourishing the kidneys it can slow down the rate of graying of the hair. According to traditional Chinese medicine, hair is the rest of blood, and it is also said that the splendor of the kidneys is in the hair, so the health of the hair is related to the sufficiency of blood and kidney essence and qi. Blood deficiency can lead to hair loss of nourishment and dryness and whitening, which can be manifested as dry, white or gray hair, accompanied by dizziness, panic, pale or yellowish face. In this case, it is necessary to nourish blood to produce hair and black hair, and you can take nourishing blood to produce hair capsule, cinnamon, Agaricus, ripe rhizome, etc. to regulate. Kidney deficiency can also lead to dry and gray hair, which can be manifested as dry and gray hair, accompanied by lumbar and knee soreness (the feeling of soreness and weakness in the waist and knees) and weakness, impotence, spermatorrhea, irregular menstruation in females, and difficulty in pregnancy. It can be regulated and treated by taking Seven Treasures Beauty Beard Pill, Five Sons Diffractive Pill, Mulberry, Chinese wolfberry and Prepared He Shou Wu. Therefore, if gray hair suddenly appears, it is recommended to consult a doctor and follow the doctor’s instructions for examination and treatment.