There are many causes of hair graying: 1, into middle age tyrosinase will gradually reduce, so that the production of melanin in the hair follicle is reduced, the acquired reduction of melanin in the hair, so there will be hair graying phenomenon, this is a normal physiological phenomenon, does not require treatment. 2, some people in adolescence will appear hair graying symptoms, related to genetics. 3, mental stress, long-term stay up late, diet is not The hair follicles are premature, aging and hair graying due to irregular diet, excessive perm, anemia, etc. Change life and diet habits, get enough sleep, do not overwork, reasonable diet, keep a good mood, strengthen nutrition, usually eat spinach, black sesame, black beans, carrots and other foods with high copper content, adhere to a period of time can make the symptoms of hair graying improved.