Obagi Professional-C Serum 20% – Vitamin C Antioxidant Serum for Face

Obagi Professional-C Serum 20% delivers a high-strength dose of pure L-Ascorbic Acid in a fast-absorbing formula made for normal to oily skin. This antioxidant serum helps brighten the look of skin, even tone, and reduce the appearance of dark spots while supporting the skin's defenses against free radicals. Sodium Hyaluronate adds light hydration so the potent vitamin C feels comfortable. Use it each morning as the first treatment step after cleansing. Explore more targeted options in our Skin Care collection. PRODUCT OVERVIEW Obagi Professional-C Serum 20% is a medical-grade antioxidant facial serum formulated with 20% L-Ascorbic Acid, the pure form of vitamin C. It is designed for people with normal to oily or combination skin who want visible brightening and stronger daily defense against environmental stress. The lightweight, fast-absorbing texture sinks in quickly so it layers well under moisturizer and sunscreen. Daily morning use helps support a more even-looking complexion, reduces the appearance of dark spots, and softens the look of fine lines. Sodium Hyaluronate helps maintain hydration so the high concentration of vitamin C remains comfortable. This serum fits into a simple morning routine: cleanse, tone if desired, apply the serum, follow with moisturizer, and finish with broad-spectrum SPF. It is one of the higher-strength options in the Professional-C line and works best for skin that already tolerates vitamin C well. KEY FEATURES 20% L-Ascorbic Acid, the highest concentration in the Professional-C serum range. Sodium Hyaluronate to support skin hydration alongside the potent vitamin C. Additional stabilized vitamin C derivative (ascorbyl glucoside) for complementary antioxidant support. Lightweight, oil-free serum texture that absorbs rapidly. Glass bottle with precision dropper for controlled application. Choose 1 fl oz (30 ml) or 0.42 fl oz (12.5 ml) based on your needs. Formulated for normal to oily and combination skin types. Designed for morning use as part of an antioxidant-focused skincare routine. HOW IT WORKS L-Ascorbic Acid is the pure, active form of vitamin C. At 20% it helps neutralize free radicals that contribute to the look of dullness, uneven tone, and early signs of aging. The formula also supports a brighter, more even-looking complexion and can improve the appearance of fine lines and wrinkles with regular use. Sodium Hyaluronate acts as a humectant, drawing moisture to the skin and helping offset potential dryness from the high-strength vitamin C. The serum absorbs quickly so the active ingredients remain available in the skin. Always follow with sunscreen, as antioxidant support works best alongside daily UV protection. WHO IT'S FOR This serum is intended for adults with normal to oily or combination skin who want a high-strength vitamin C treatment. It suits people concerned with the appearance of uneven tone, dark spots, dullness, or early fine lines and who already tolerate vitamin C products. It is not the best starting point for very dry, sensitive, or barrier-compromised skin. Those new to vitamin C may prefer a lower concentration (10% or 15%) first. Patch testing is recommended. This product is for external cosmetic use only and is not a treatment for medical skin conditions. WHY CHOOSE THIS PRODUCT Obagi Professional-C Serum 20% offers one of the highest concentrations of pure L-Ascorbic Acid available in the Professional-C line. The formula pairs that strength with Sodium Hyaluronate for added comfort and a fast-absorbing texture that works well under daytime products. It is specifically positioned for normal to oily skin, reducing the risk of a heavy or greasy feel. The dropper packaging allows precise dosing, and the product is backed by Obagi's long-standing focus on professional-grade skincare. Customers looking for a potent, straightforward vitamin C serum with clear usage guidelines will find this option direct and effective when used as directed.