Obagi Medical Vitamin C Serum 20% L-Ascorbic Acid 0.42 oz — Brightening, Fast-Absorbing Antioxidant

Obagi Professional-C 20% Vitamin C Serum is a high-strength L-ascorbic acid formula designed to brighten skin tone and help reduce the visible signs of aging.

This concentrated serum from Obagi Medical delivers 20% pure L-ascorbic acid in a formulation calibrated for stability and skin absorption. It’s part of a physician-developed line used by skincare professionals; the formula aims to support an even complexion, improve surface texture appearance, and help the skin look more resilient. The lightweight fluid absorbs quickly and is intended to pair with your existing routine — morning or evening — while following product-specific guidance for layering.

How does this serum help improve skin radiance?

The 20% L-ascorbic acid concentration targets uneven tone and dullness by supporting the skin’s natural surface renewal processes. Regular use can help the complexion look more luminous and even, while the formula is balanced to promote effective penetration.

• 20% pure L-ascorbic acid — a potent, well-studied form of vitamin C
• pH-balanced for improved stability and skin absorption
• Lightweight, fast-absorbing texture for layering under hydrators or sunscreen

Will this reduce the appearance of fine lines and texture concerns?

The serum is designed to support the appearance of smoother skin by addressing surface irregularities and the look of fine lines. While not a medical treatment, its antioxidant activity and concentrated formulation help the skin appear more refined over time when used consistently.

• High-strength vitamin C to help brighten and soften visible lines
• Formulated to reinforce the skin’s visible surface resilience
• Compatible with many professional-grade skincare regimens

How should I add Obagi Professional-C 20% to my skincare routine?

Introduce the serum gradually, applying a few drops to clean, dry skin once daily or as recommended by your skincare professional. Follow with a moisturizer and broad-spectrum sunscreen in the morning; consult your provider about combining with other active ingredients to avoid irritation.

• Apply after cleansing and toning, before heavier creams or oil-based products
• Use sunscreen daily when using vitamin C products
• Start with alternate-day use if you have sensitive skin, then increase frequency

Is this product clinically evaluated and suitable for varied skin tones?

Obagi’s Professional-C line has been evaluated in consumer studies and developed with a focus on clinical performance across skin types. The brand emphasizes professional testing and dermatologist involvement in formulation to support broad use, though individual responses can vary.

• Clinically tested with consumer-reported improvement in brightness and hydration
• Physician-formulated and dermatologist-tested components
• Designed to pair with professional skincare protocols for diverse skin tones

Who is this for: Obagi Professional-C 20% Vitamin C Serum is intended for adults seeking a potent, medical-grade vitamin C concentrate to address dullness, uneven tone, and the appearance of fine lines. It’s a fit for people comfortable incorporating high-strength actives into their routine or those under professional guidance wanting a product trusted by skincare clinicians. If you have very sensitive or reactive skin, consider consulting a dermatologist before use and introduce the product slowly to assess tolerance.