Common herbs to prevent hair loss include Astragalus, which contains a variety of amino acids, betaine, folic acid, alkaloids, and essential trace elements, and has the effect of dilating blood vessels, improving skin nutrition, preventing hair loss, and promoting hair growth, and is one of the drugs commonly used in hairdressing formulas. Angelica sinensis has the effect of blood circulation, blood tonic, pain relief and emolliency. It also dilates the capillaries of the scalp and skin, promotes blood circulation and resists vitamin E deficiency. In the case of Angelica extract made of Angelica shampoo, it can also nourish the skin and hair, make the hair dark and shiny, and effectively prevent yellow and gray hair. There is also Salvia miltiorrhiza, the main effect of Salvia miltiorrhiza is to invigorate blood circulation and remove blood stasis, due to the richness of vitamins and trace elements such as zinc, copper and iron, can promote the production of hair melanin, but also improve the lack of trace elements caused by gray hair, yellow hair, dry hair disease.