To make hair beautiful, an important aspect is to reasonably supplement nutritious food that is helpful for hair bodybuilding. Traditional Chinese medicine believes that qi is nourished by blood, so it is called "blood surplus". Although the nutrition of hair comes from blood, its vitality is rooted in kidney qi, therefore, hair is a syndrome outside the kidney. The growth and shedding, moistening and withering of hair are all related to the rise and fall of kidney essence. Therefore, in order to maintain the health of hair, we should always take dietotherapy meals that tonify liver and kidney and benefit essence and blood, and often choose Radix Rehmanniae Preparata, Fructus Lycii, Rhizoma Dioscoreae, Polygoni Multiflori Radix, Mulberry, Black Sesame, Black Soybean, Spinach, Carrots and Walnuts. Modern medicine also believes that human hair is related to the rise and fall of bone marrow. Red blood cells and white blood cells in blood are formed in bone marrow, and the decline of bone marrow is caused by the lack of mucin and periosteum, so the lack of these substances directly affects the growth of hair. Therefore, it is very important to regularly supplement some iron, sulfur, vitamin A and high-quality protein necessary for hair growth. Scientists have found that 30% of balding women are iron deficiency balding, which is a kind of common balding. Once the diet is adjusted in time and iron-containing food is supplemented, baldness will stop immediately and new hair will grow again. Therefore, iron-rich foods such as soybeans, black soybeans, spinach, duck meat, eggs, hairtail, shrimp, cooked peanuts, carp, bananas, carrots and potatoes should be regularly supplemented. Some people's hair turns yellow and dark because of acid toxins in the blood. Its cause is not only physical and mental fatigue, but also the acid substances such as lactic acid, pyruvic acid and carbonic acid produced in the metabolic process of the body are retained due to eating pure sugar and fatty foods for many years, thus producing acid toxins. Therefore, we should reduce the intake of pure sugar (such as sucrose and beet sugar) and fat, and pay attention to the intake of foods rich in iodine and calcium and protein, such as kelp, laver, squid, fresh milk, eggs and beans. In addition, the dark and beautiful hair is due to the effect of thyroxine, and the trace element iodine can increase the secretion function of stimulating thyroid, so eating seaweed foods containing iodine, such as laver and kelp, can make hair moist and dark. For people with dandruff and itchy scalp, they should avoid greasy foods such as frying in oil and burning in oil, fermented foods and dairy products, and starch foods should not be overeated. Eating fresh vegetables and fruits, such as Pingguo, Plum, Leek, Green Onion and Carrot, can inhibit scalp itching and dandruff. The following introduces the consumption of several daily easy-to-get foods. ◆ Black Sesame Method: Wash black sesame seeds, dry them in the sun, fry them with low fire, grind them into coarse powder and bottle them. Add a little sugar to two spoonfuls of sesame powder before going to bed every night, and take them with warm water. Rinse your mouth and clean your teeth after eating. Function: nourishing blood and moistening dryness, nourishing liver and kidney, blackening beard and hair. ◆ Walnut method: Before going to bed every night, take several walnuts and smash their shells for meat, or make them into dishes. Function: Warming lung and kidney, relieving cough and asthma, nourishing qi and blood, and moistening skin. ◆ Kelp and laver method: Before lying down every night, take a proper amount of kelp or laver to make soup. Function: Moisturize hair, blacken beard and hair. Kelp and laver contain protein and minerals, and are rich in iodine, vitamins B2 and B6. ◆ Fruit method: Before lying down, take an apple or plum and carrot, wash them with warm water and eat them. Function: Hair care. Fruit is rich in vitamins and other trace elements necessary for hair growth. ◆ Spinach soup method: Before going to bed every night, take 2 pairs of spinach and make a bowl of spinach soup and eat it. Function: strengthen the spleen to help transport, nourish blood and blacken hair. Description: Spinach is rich in iron and vitamin C and B, which provides sufficient raw materials for the synthesis of melanin particles. Eating spinach can enhance gastrointestinal peristalsis and help digestion. Classification of foods with hairdressing function ◆ Fruits: apricots, mangoes, lemons, peaches, red fruits, black dates, etc. ◆ Dried fruits: dried apricots, dried mangoes, raisins, dried persimmons, candied dates, sunflower seeds, walnuts, sesame seeds, peanuts, dried mulberries and medlar. ◆ Vegetables: carrots, amaranth, rape, spinach, coriander, celery leaves, rape moss, shepherd's purse, etc. Meat: pork liver, sheep liver, beef liver, rabbit liver, chicken, duck, goose and so on. ◆ Milk eggs: eggs, duck eggs, egg yolk, egg powder, milk powder, butter, etc. ◆ Aquatic products: snails, oysters, river crabs, snails, mussels, etc. ◆ Cereal beans: barley, corn, soybeans, black beans, adzuki beans, lentils, cowpeas, etc. In a word, in order to make hair beautiful, we must give it adequate nutrition. Pay attention to reasonable collocation in diet, and ensure the supply of protein and fatty acids, iron, copper, iodine, zinc and various vitamins closely related to hair bodybuilding. And we should avoid eating habits that are harmful to hair fitness, such as cream and thick taste, drinking strong liquor, strong tea and overeating greasy and spicy foods.