1, stay optimistic. Being optimistic about life and keeping a happy mood will help your hair to be black and bright. Don't put your psychological world in despair even if you encounter something unsatisfactory, even misfortune. Because this is tantamount to punishing yourself with other people's mistakes, which will not only help, but also be counterproductive and even cause greater misfortune, thus speeding up the pace of gray hair. 2. Strengthen nutrition. Hair will turn white when it loses the nutritional supply to maintain normal pigment. Many scientific studies have proved that nicotinic acid, p-aminobenzoic acid, carotene and citric acid in vitamins play an important role in the formation and metabolism of pigments. If there are obstacles or changes in their absorption, storage and utilization, moss will turn into hoarfrost. In diet, food contains vitamins B 1, B2, B6, nicotinic acid and so on. It must not be lacking for a long time, otherwise the hair will turn from black to gray and then white. Scientific research in recent years also shows that. Lack of some trace elements, such as copper and iron, can also make hair white. 3. Treat diseases. Some infectious diseases and chronic focal inflammation. Such as dental caries, tonsillitis and suppurative sinusitis. It can also cause white hair through bacterial action and nerve reflex. In endocrinology, pituitary gland, adrenal gland and autonomic nervous system are closely related to the secretion function of black excitatory hormone, which promotes the formation of melanin. Endocrine is normal, black excitatory sex hormones are secreted more, melanin is formed more, and hair color is deeper; On the contrary, white hair will be overgrown. In addition, sexual dysfunction can also lead to white hair. Therefore, in order to prevent white hair, the above diseases must be treated as soon as possible.