In recent years, the problem of white hair in our country has brought serious life and psychological problems to our friends, and having white hair is a physiological phenomenon. At present, the incidence rate of white hair can be divided into congenital white hair and acquired white hair. What we mean by white hair here is the white hair of young people, which means that some or all of their hair has turned white. And the onset age and symptoms of each type of white hair are different. 1、 The main causes of white hair are: White hair is mainly related to psychological factors, accounting for about 50% according to clinical observations. Due to factors such as work and exams, long-term mental stress and neurasthenia, excessive worry can cause blood vessels to supply hair with nutrients, resulting in spasms and insufficient transmission of nutrients. This can lead to melanin dysfunction in the hair nipples, reduced pigmentation, and ultimately white hair. Other factors such as long-term picky eating, picky eating, being single, or suffering from chronic diseases can all cause it. In addition, there is no significant relationship between white hair and hair loss. However, psychological factors can cause the nervous system to remain in a state of tension for a long time, leading to dysfunction of the autonomic nervous system, skin blood vessels, and nerves. Therefore, hair nutritional disorders cannot be ignored. 2、 How to prevent white hair: Firstly, we should be spiritually happy and live a regular life, so that the regulation of blood vessels and nerves is in a normal state. Secondly, we should persist in combing our hair, increase blood circulation, pay attention to the balance of diet and nutrition, eat more grains and vitamins, eat less sweet, less oil, less spicy, and drink less. Thirdly, you can eat fried black beans and half black beans, one tablespoon of black sesame seeds, together every night, once a day, which has the effect of dark hair, moisturizing hair, and silky hair.