One of the most common ingredients found in skin lightening creams is hydroquinone. This ingredient is frequently used by dermatologists to treat a variety of skin conditions. How Does Hydroquinone Work? Hydroquinone slows melanin production in areas where pigmentation has become darker than a person’s normal skin tone. It does this by inhibiting the enzyme tyrosinase, which is needed to make melanin. The decrease in melanin from the medication lightens…