There is no best treatment for turning gray hair to black hair. The cause of gray hair may be due to physiological factors, such as aging and heredity, and can be colored to make gray hair black. Pathological factors, such as the lack of trace elements, vitiligo, etc., the patient can be under the guidance of the doctor through the drug to the symptomatic treatment. 1. physiological factors: aging and hereditary caused by gray hair is generally determined by genes, irreversible, there is no good clinical treatment, the patient in the usual good habits, avoid staying up late to prevent the aggravation of gray hair. If white hair wants to become black hair, you can dye your hair. 2. Trace element deficiency: When copper and zinc and other trace elements are lacking, it can also cause gray hair. Patients can take oral multivitamin tablets to improve. 3. Vitiligo: For patients with vitiligo, the hair in the lesion area will become white. Patients can use mometasone furoate ointment under the guidance of doctors to improve. When the patient appeared white hair, it is recommended to go to the regular hospital in time to check, under the guidance of professional doctors standardized treatment.