Obagi-C Rx C-Clarifying Serum for Normal to Dry skin is a prescription-only treatment that combines 4% hydroquinone with 10% L-ascorbic acid (vitamin C) to reduce hyperpigmentation and improve skin tone. Hydroquinone inhibits melanin production to fade dark spots and melasma, while vitamin C provides antioxidant protection and brightens the skin. This serum is ideal for normal to dry skin types and helps maintain a youthful, even complexion. . Please Note that product description, color, ingredients, package and other information maybe different from the original pack kindly check the product for more accurate details.