Ideal for sensitive skin types or those new to vitamin C antioxidant serum, Serum 10 AOX utilizes 10% 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. In addition to providing the benefits of vitamin C, this antioxidant serum also helps improve the appearance of fine lines and wrinkles.