The direct cause of gray hair at the age of 30 is the reduction of melanin particles in the hair, usually with age, the function of pigment cells in the hair gradually decreases, at the age of 30-40, some people will begin to appear gray hair, usually starting from the two temples, gradually develop to the top of the head, followed by beard, nose hair, body hair will also successively The graying of the beard, nose hair and body hair will follow. At this time, there is no special method to restore the hair color, usually you can choose to dye your hair. In addition to the normal physiological reasons mentioned above, the reduction of melanin in the hair is also common due to bad habits and disease factors that can also damage the hair papillae, resulting in a reduction of melanin, which needs to be promptly identified and targeted treatment. 30-year-olds with gray hair due to factors such as anxiety and malnutrition can adjust their lifestyle to avoid too much anxiety, while not being partial to food, not being picky, and eating more foods rich in tyrosine, vitamin B and micronutrients, such as soybeans. Trace elements of food, such as beans, fresh vegetables, fruits, black sesame, animal liver, nuts, etc., to ensure balanced nutrition and food diversity; quit smoking and alcohol, and develop good habits. Ensure sufficient sleep, improve the quality of sleep, exercise, enhance physical fitness, so that the weight standard, may have the opportunity to restore the hair color. When patients have vitiligo, albinism, etc., the lesions spread to the scalp, affecting hair growth, can also lead to hair whitening, it is recommended that you can go to the regular hospital to do the relevant examination to further clarify the cause of the disease and then deal with it.