Hair is scarce, so it is recommended to take the following drugs or foods: the first kind, auricularia auricula, has the effect of promoting blood circulation, can effectively improve blood circulation in the head and promote hair growth; Secondly, Polygonum multiflorum Thunb and Polygonum multiflorum Thunb contain a lot of nutrients such as lecithin, which has the effect of enriching blood and can effectively promote the production of melanin in hair. In addition to treating alopecia, it can also make hair black. The third kind, black sesame, has the function of enriching blood and can effectively dilate the capillaries in the head. You can eat more black beans, walnuts, carrots, lettuce and other foods in your diet, which has a good effect on hair growth and can nourish your hair. Carrots contain vitamin A and beta carotene. Eating more carrots can supplement certain trace elements to the body. If you massage the scalp more often, you can increase the blood circulation of the scalp and grow faster. Lettuce contains many trace elements such as iron and zinc, which are easily absorbed by human body. Therefore, eating fresh lettuce often can achieve the effect of invigorating qi, generating blood and promoting hair growth. Black beans contain a lot of protein, vitamins and iron, so they can nourish hair. The fat content of walnut kernel is relatively high, but there are many other nutrients beneficial to human body, so eating walnut kernel can make hair grow faster and become black and shiny.