Although with the age of aging, the body’s melanin cells will gradually decrease leading to hair whitening, but the 50-year-old man with white temples belongs to the phenomenon of premature whitening of hair, this situation is not a normal phenomenon, may be related to genetic, mental, nutritional deficiencies and other factors. 1. Hereditary factors. Hair color changes have a certain genetic predisposition, for the family has hair early white people appear, the chances of white sideburns will increase significantly. 2. Mental factors. Long-term in excessive depression or excessive tension of the mental state, long-term mental stress will affect the growth of hair and hair color, resulting in premature white hair. 3. Nutritional deficiencies. Copper, zinc, iron and other trace elements and vitamins are involved in the formation of melanin, when the lack of the above nutrients (especially copper, iron and vitamin B12), may lead to pigmentation loss or complete disappearance of the situation, and ultimately lead to the phenomenon of premature graying of hair. It is advisable to consult a doctor to find out the cause of premature graying of hair.