OBAGI Medical Professional-C Serum 20% L- Ascorbic Acid Vitamin C Serum

A professional-grade and clinically formulated vitamin C serum containing a potent 20% concentration of pure L-ascorbic acid, representing one of the highest and most effective levels of stabilized vitamin C available in a topical skincare formula. L-ascorbic acid at 20% delivers an aggressive and accelerated brightening, antioxidant, and collagen-stimulating action that drives visible and measurable results at a level comparable to professional skincare treatments. The pure and stabilized form of vitamin C penetrates deeply into the skin to neutralize free radical damage, interrupt melanin production, and progressively fade dark spots, hyperpigmentation, and sun damage for a dramatically more even and luminous complexion over time. Collagen synthesis is significantly stimulated at this concentration, visibly improving skin firmness, elasticity, and overall skin structure while reducing the appearance of fine lines and wrinkles with consistent use. The high potency formula is specifically designed for those who have built a tolerance to lower concentration vitamin C serums and are seeking more aggressive and clinically visible brightening and anti-aging results. With consistent use skin appears dramatically brighter, more even in tone, firmer, and noticeably more radiant and thoroughly revitalized in texture and appearance. Suitable for normal, combination, and oily skin types and recommended for gradual introduction to allow the skin to build tolerance to the high concentration formula.