Scientific tests have found that human hair contains dozens of essential nutrients, including multivitamins? Amino acids and iron? Iodine? Zinc and other minerals and trace elements. Researchers can not only detect nutrients contained in hair, but also detect human blood type and various biological indicators in blood through hair. In short, the nutrition supplied to the hair is indispensable in an instant. The longer the hair is, the more it is consumed. It is difficult to calculate the nutrition consumed over time. If the human body lacks nutrition, essence and blood, or is weak and malnourished after a long illness, it will lead to hair withering, thinning, easy to break and even falling off.