Obagi Professional-C provides superior antioxidant protection with deep pentration. Superior delivery system, resulting in greater penetration to all layers of the skin. Suitable for all skin types. Design house: Obagi. Series: Obagi System Professional-C 15% Vitamin C Serum. Gender: Ladies. Category: Skin Care. SubType: Oil & Serums. Size: 1 oz. Barcode: 362032050522. Obagi System Professional-C 15% Vitamin C Serum by Obagi for Women - 1 oz Serum.