Is Zen white to black shampoo a national regular product?

Very formal. It is safe and healthy, and will not cause harm to human body. The ingredients are pigments extracted from plants, which naturally form black hair after synthesis and contain no chemical components. It is a product certified by the US Food and Drug Administration, in which the main herbal ingredients are Gleditsia sinensis, Polygonum multiflorum Thunb, mica and so on. It is a shampoo that can wash white hair into black hair. It has high coverage, is not easy to fade, and is safer and healthier.