There has always been a saying in Chinese medicine that if a person's hair is thick and yellow, it means that this person is seriously malnourished and needs food supplements to supplement the vitamins needed in the body. Diet, you can add some foods that can protect your hair. For example, there are black sesame and Polygonum multiflorum Thunb. Black Sesame Everyone knows that eating black sesame seeds often makes your hair bright and shiny. Although some people object to this statement, it turns out that eating more black sesame seeds will really improve hair quality. But nothing can make your hair black and bright at once. If the hair is coarse and yellow, you can make some improvements by taking food supplements, because eating black sesame seeds itself has many benefits to the human body and will not do any harm. On the other hand, we can start with changing care products. Rough and yellow hair may also be because the shampoo products you often use are wrong. If you use inappropriate shampoo products, it will do great harm to your hair. Changing care products in time will nourish and protect your hair. Therefore, if you want your hair to be less dry, you need to change the care products that suit you regularly. If changing care products has little effect on you, it is actually a physical reason. It is necessary to have a healthy eating habit, because unhealthy eating habits are very harmful to the human body. Whether a person is healthy or not, in fact, the most important thing can be reflected in his hair. Therefore, if you want your hair to get better, you should start with your eating habits, which is the most effective measure to really change your hair quality.