There are no relevant clinical studies that prove that horsetail has a therapeutic effect on gray hair, and therefore there is no practice of treating gray hair. There are few medical treatments for gray hair, and there are no safe and effective treatments in Chinese medicine and Western medicine, and the main treatment is based on prevention, mostly using drugs. The formation of gray hair is influenced not only by congenital genetics, but also by the mental state, nutritional supplements, and endocrine function. The main herbs commonly used to prevent gray hair are He Shou Wu, Dry Lotus Grass and Chaste Tree, but the genetic causes of gray hair cannot be changed essentially, so the treatment effect is not obvious. And horsetail is rich in vitamin C, vitamin E, polysaccharides, flavonoids and other components, mainly with antibacterial and anti-inflammatory, clearing heat and dampness, etc. It is often used clinically for patients with bacterial dysentery, scabies, urticaria, hemorrhoids, anal fistula and other skin diseases, so it is not recommended to treat gray hair with horsetail. In addition, if the patient’s gray hair is suddenly increased, also suggests that it may be due to long-term malnutrition, severe mental weakness, and leukemia, etc. It is recommended to go to the hospital as soon as possible to improve the relevant examination to clarify the cause of the onset of targeted treatment to remove the causes of gray hair generation, so as to get some improvement in the appearance.