Obagi Professional-C 15% Serum is a concentrated Vitamin C serum that provides potent antioxidant benefits to your skin. Vitamin C, in its most powerful formulation as L-Ascorbic acid, aims to brighten the skin while also preventing and reducing the signs of prematurely ageing skin. Its antioxidant properties will help defend the skin's barrier, and reduce the signs of previous skin damage, including by reducing fine lines and wrinkles. As a powerful antioxidant it fortifies the skin's natural defenses against pollution and environmental factors that speed up the ageing of the skin. This serum is suitable for normal to dry skin types.