Serum 10

SkinCeuticals Serum 10 AOX+ is a lightweight vitamin C antioxidant serum formulated for sensitive skin and those new to vitamin C. Combining 10% pure L-ascorbic acid with 0.2% ferulic acid under the Duke Antioxidant patent, it neutralizes free radicals from UV and environmental aggressors while visibly reducing fine lines and wrinkles. Paraben-free, fragrance-free, alcohol-free, and dye-free.

Skin Types

Formulated for normal and sensitive skin, including reactive, sensitized, and acne-prone skin types. Its 10% concentration delivers effective antioxidant protection without the potential irritation of higher-concentration formulas — making it the ideal introductory vitamin C serum.

Skin Concerns

Addresses sensitized skin, acne, and visible signs of environmental aging including fine lines, wrinkles, and dullness.

Benefits

• Neutralizes free radicals from UV, pollution, and environmental aggressors
• Reduces the appearance of fine lines and wrinkles with daily use
• Restores healthy-looking, more radiant skin
• Ideal introductory vitamin C serum for sensitive and first-time users
• Formulated under the Duke Antioxidant patent for clinically validated delivery
• Paraben-free, fragrance-free, alcohol-free, and dye-free
• Can also be applied to the backs of the hands

Key Ingredients

• 10% L-Ascorbic Acid (Pure Vitamin C) — The most bioavailable form of vitamin C, delivering effective free radical neutralization and visible anti-aging benefits at a concentration well-tolerated by sensitive skin. Formulated to the Duke Antioxidant patent parameters for optimal penetration and efficacy.
• 0.2% Ferulic Acid — A plant-based antioxidant that neutralizes free radicals and enhances the stability and efficacy of vitamin C, ensuring sustained antioxidant protection throughout the day.

The Science

SkinCeuticals antioxidants are formulated under the Duke Antioxidant patent, which requires pure L-ascorbic acid, a pH of 2.0–3.5, and a concentration of 10–20%. Serum 10 AOX+ meets all three criteria at the lowest effective concentration — making it the most accessible entry point into the SkinCeuticals vitamin C range for sensitive and reactive skin.

How to Use

Each morning after cleansing, apply 4–5 drops to a dry face, neck, and chest before other skincare products. May also be applied to the backs of the hands. Allow to absorb fully before moisturizer and sunscreen. It is normal for vitamin C to darken after opening — the formula remains effective. Use within 3 months of opening for optimal potency.