In recent years, it has been found that the production of yellow hair is mainly due to the presence of acidosis, and the production of white hair is mainly due to the development of acidosis. People's physical strength and energy are too tired, too much sweets, lack of protein, especially the lack of iodine, will promote their own acidosis. The well-known kelp, not only has a high nutritional value, but also contains a variety of vitamins, cellulose and minerals, and is also a good medicine to prevent goiter. The iodine in kelp is extremely rich, and this element is the main raw material for the synthesis of thyroxine in the body. The luster of the hair is formed by the action of thyrotrophin in the body. The "hair quality" and the keratinous ingredients contained in it are extracted from the sulfur-containing protein, which is an important substance for making the hair shine. In addition to iodine, calcium and sulfur, kelp also contains iron, sodium, magnesium, potassium, cobalt, phosphorus, mannitol and vitamins B1, B2, C and many other substances. These nutrients are good for hairdressing. Therefore, eating kelp often has special effects on hair growth, moisturizing, blackening and brightening.