It is formal. It is safe and healthy and will not harm the human body. The ingredients are synthesized from plant pigments to naturally form black hair, without chemical ingredients. It is a product certified by the State Food and Drug Administration, and its herbal ingredients mainly include saponin, polygonum multiflorum, mica, etc. It is a shampoo that can wash white hair into black hair. It has a higher coverage rate of white hair, is not easy to fade, and is safer and healthier.