Obagi Professional-C 10% Vitamin C Serum is a powerful antioxidant facial serum formulated with 10% L-Ascorbic Acid (Vitamin C) to help brighten the complexion, improve skin texture, and protect against environmental stressors. This lightweight serum helps reduce the appearance of fine lines, uneven skin tone, and dullness while promoting a smoother, more radiant-looking complexion.