How Do Skin Lightening Creams Work?
The most effective skin lightening creams contain hydroquinone, says Bruce Katz, MD, a dermatologist and director of the Juva Skin and Laser Center in New York City. Some creams may contain kojic acid, but they’re less effective, says Dr. Katz. Others combine hydroquinone and kojic acid. You can buy them over the counter or have them prescribed by a dermatologist. These products lighten skin by causing a chemical reaction that blocks melanocytes, the skin cells that give your skin its pigmentation, explains Katz. A skin lightening cream is meant to be used for a maximum of two to three months, says Katz. This is enough time to lighten skin without causing any damage. If you’re diligent about staying out of the sun (which stimulates melanocytes to darken your skin) and if you avoid problems that can cause brown spots such as acne, your skin should stay lightened for good, Katz says.
