DescriptionHyperpigmentation is the uneven darkening or spotting on an area of skin caused by the overproduction of a pigment called melanin. It can occur for a number of reasons, including exposure to UV rays, aging, genetics, hormonal changes, and even certain medications. IngredientsHydroquinone 4%, 10% L-ascorbic Acid, Propylene Glycol, Propylene Carbonate, Purified Water, Sodium Lauryl Sulfate.InstructionsAfter washing apply 5-7 drops of serum to the entire face or as directed by physician.