There are several skin lightening ingredients that dermatologists recommend for black skin. Hydroquinone is the most effective ingredient for skin lightening, but it should be used with caution and under the supervision of a dermatologist. Other ingredients that can be used for skin lightening include niacinamide, tranexamic acid, azelaic acid, kojic acid, licorice extract, and vitamin C. Some skin lightening products may combine these ingredients. It is important to note that unregulated skin lightening creams may include many other ingredients that can be toxic, irritating, or likely to provoke allergy. Therefore, it is recommended to use skin lightening products that are prescribed or recommended by a dermatologist.