Hello, landlord. Black skin is useful with whitening needles. Most of the ingredients in whitening needle are antioxidant ingredients, including glutathione, tranexamic acid and vitamin C. Glutathione helps the body to detoxify and also helps cells to resist oxidation. Tranexamic acid can be used to control the enzymatic action of melanin and reduce the formation of melanin. When injected, the liquid is injected into the human body in the form of drops, and the whitening effect can be gradually seen after 3 days of injection. Mine is a whitening injection from Shanghai Merrick Plastic Surgery Hospital. It looks natural. It looks natural. I suggest you go there to find out. The doctors there are all very professional.