You can use it in moderation, but you can't rely too much. Generally, this product will have a short-term effect, but it can't be cured. Hair growth shampoo and black hair shampoo are better for white hair, but they can play an auxiliary treatment role and cannot be completely cured. If you want to completely blacken your hair from the root, you'd better go to the hospital for a professional examination. Almost all shampoos can blacken white hair because it contains many different chemicals. Some plants dye their hair black through various chemical components, which is not only unhealthy for the body, but also harmful to the hair roots, so it is not recommended to use shampoo products.