Obagi Professional-C Serum 15% delivers professional-grade antioxidant protection with pure L-ascorbic acid, the gold standard form of Vitamin C. This highly concentrated formula works daily to strengthen your skin's natural defenses, helping restore a brighter, more even complexion while visibly reducing fine lines and wrinkles. Designed for most skin types, it locks in moisture and supports a youthful glow that lasts. Experience the transformative power of clinical-strength Vitamin C skincare.