The "principal, assistant, adjuvant, and guide" principle in the Inner Canon of Medicine refers to the principle of pairing Chinese medicinal herbs to form effective compound prescriptions. Huaye Herbal Nourishing Mud is made from 20 different Chinese herbal extracts. Through our scientific research team, appropriate ingredients are combined and continuously tested to achieve synergistic effects and allow the product to exert its best results. It can regulate and nourish various annoying problems on the scalp and hair. While nourishing the scalp, it can also cover gray hair. At the same time, Huaye strictly selects and inspects the quality of each batch of raw materials to ensure that customers can use it with peace of mind.