In addition to congenital genetic factors, gray hair is mostly caused by nutritional deficiencies, long-term mental stress and vitiligo. There are a lot of gray hair can be through dietary modification, treatment of underlying diseases, life adjustment and other methods in order to reduce the growth of gray hair. 1. Dietary adjustments: in daily life, many white hair patients can eat more tyrosine-rich foods. Because the lack of tyrosine can also lead to an increase in gray hair, because the material basis for the formation of melanin is tyrosine. You can moderate more intake of some tyrosine-rich foods, such as nuts, dairy products and so on. 2. Treatment of the underlying disease: If the white hair is caused by some diseases, such as vitiligo, etc., it will be due to genetic or immune factors that make melanocyte metabolism abnormal, thus appearing white hair. This situation needs to be under the guidance of the doctor to actively treat the primary disease, the general condition improves, white hair generally will not grow again, but has grown out of the white hair, may not become black. 3. Life regulation: long-term mood depression, insomnia, late at night, nervousness and anxiety, etc., will lead to the emergence of gray hair. Usually need to keep a relaxed mood, avoid staying up late or tired, reasonable arrangement of rest time, appropriate outdoor sports, to maintain physical and mental health. It can help slow down the aging process and reduce the generation of gray hair. Growing a lot of white hair is generally difficult to black, can only reduce the growth of white hair mainly, such as the need for treatment, it is recommended to regular hospitals, follow the doctor’s instructions for standardized treatment.