Design house: Obagi. Series: Obagi System Professional-C 10% Vitamin C Serum. Gender: Ladies. Category: Skin Care. SubType: Oil & Serums. Size: 1.0 oz. Barcode: 362032050515. Concentrated formula recommended for dry, irritated or sensitive skin. Contains the L-ascorbic acid form of vitamin C, a potent antioxidant. The 10% L-ascorbic acid helps brighten the skin, retain moisture and minimize the appearance of fine lines and wrinkles. Suitable for dry or sensitive skin.Obagi System Professional-C 10% Vitamin C Serum by Obagi for Women - 1 oz Serum.