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Serum 15 AOX+ Daytime antioxidant serum

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A daytime antioxidant that provides vitamin C serum benefits including environmental protection for all skin types and improves the appearance of fine lines and wrinkles

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Product Details

Serum 15 AOX+ combines 15% pure vitamin C (l-ascorbic acid) and 0.2% ferulic acid to help neutralize damaging free radicals that contribute to atmospheric skin aging – environmental damage and premature signs of aging caused by free radicals from UVA/UVB radiation. This antioxidant face serum also helps improve the appearance of fine lines and wrinkles for healthy skin.

  • Neutralizes free radicals caused by environmental aggressors
  • Reduces the appearance of fine lines and wrinkles
  • Paraben-, fragrance-, alcohol-, and dye-free
  • Ideal for most skin types

How To Use


In the morning after cleansing, apply 4-5 drops to a dry face, neck, and chest to promote healthy skin. Apply before other skincare products. May be used on the back of the hands. It is normal for vitamin C products to darken after opening due to air and light exposure. The formula will remain effective. Once opened, it is recommended to be used within 3 months of opening.

Complete your regimen with a SkinCeuticals sunscreen. When used together, SkinCeuticals antioxidants and broad spectrum sunscreens provide more comprehensive protection against visible aging caused by environmental aggressors.

  • Science & Proof

  • Science

    This lightweight antioxidant face serum combines 0.2% ferulic acid with 15% pure vitamin C (l-ascorbic acid) for enhanced vitamin C serum benefits. It is formulated under the Duke Antioxidant patent. Vitamin C is a highly-potent antioxidant that by its structure has difficultly being effectively absorbed by skin. The Duke Antioxidant patent outlines the formulation parameters required for effective delivery of vitamin C to skin: 1) pure l-ascorbic acid (vitamin C); 2) an acidic pH within the 2.0-3.5 pH range and; 3) a concentration between 10%-20%. SkinCeuticals is the only brand to formulate antioxidants according to these parameters.

Key Ingredients

  • 15% L-ascorbic acid
  • 0.2% ferulic acid

Lauded for its superior antioxidant benefits, this highly potent form of pure vitamin C helps neutralize free radicals and protect against oxidative stress while providing visible anti-aging benefits.

See all ingredients

aqua / water / eau, ascorbic acid, ethoxydiglycol, propylene glycol, glycerin, zinc sulfate, phenoxyethanol, panthenol, ferulic acid, sodium hydroxide, sodium hyaluronate

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