It is less likely that gray hair will turn black without any treatment. However, it is possible to turn gray hair black if it is conditioned according to the specific cause of the gray hair. There are various causes of gray hair. If the patient is young and has a small amount of gray hair, it may be related to micronutrient deficiency. Eating more iron-rich vegetables such as celery and spinach on a daily basis and ensuring enough sleep can usually turn gray hair black. If the patient is older and has premature gray hair due to malnutrition, the gray hair may turn black if their nutritional status is ensured. Patients can eat more black foods, such as fungus, black sesame, black beans, etc., all help to make the hair black and increase the luster. In addition, mental trauma, genetics and other factors may also turn gray hair black, through emotional adjustment, avoid anxiety, anger, maintain a good routine, avoid strain, eat more walnuts, black sesame, carrots, spinach and other foods, but also through the Chinese medicine conditioning, acupressure, etc., so that the gray hair to a certain extent to black. If the effect of turning white hair black is poor through the above methods, you can also directly achieve the purpose of turning black through hair dyes, but you need to choose a regular hair dye to reduce the damage to the body.